| Fosse |
| Trench |
| Zoo sight |
| Keep guard |
| Water ring |
| Zoo trench |
| Zoo feature |
| Castle area |
| Castle ring |
| Gator bowl? |
| Zoo channel |
| Zoo barrier |
| Castle ditch |
| Ditch of old |
| Watery ditch |
| Castle guard |
| Water barrier |
| Castle hassle |
| Palace guard? |
| Defense ditch |
| Ring of water |
| Castle trench |
| Water boundary |
| Castle feature |
| Liquid defense |
| Castle adjunct |
| Fortress fosse |
| Watery defense |
| Zoo protection |
| Castle's ditch |
| Defensive ring |
| Castle barrier |
| Castle circler |
| Castle defense |
| Defensive ditch |
| Castle guardian |
| Castle isolator |
| Castle obstacle |
| Castle security |
| Circle of water |
| Defence feature |
| Drawbridge spot |
| Siege deterrent |
| Castle crossing |
| Castle waterway |
| Castle's trench |
| Drawbridge site |
| Castle surround |
| Medieval defense |
| Anagram for atom |
| Castle's circler |
| Ditch of defense |
| Fortress barrier |
| Stage protection |
| Zoo construction |
| Attack deterrent |
| Barrier at a zoo |
| Castle encircler |
| Fortress feature |
| Castle enclosure |
| Castle's defense |
| Medieval barrier |
| Defensive trench |
| Palace protector |
| Protective ditch |
| Castle protector |
| Part of a defense |
| Barrier to entry? |
| Bygone protection |
| It can hold water |
| Drawbridge locale |
| Palace protection |
| Rampart protector |
| Castle wraparound |
| Protective trench |
| Castle surrounder |
| Castle protection |
| Defense mechanism? |
| Castle surrounding |
| Castle water ditch |
| Croc's home, maybe |
| Modern zoo feature |
| Rampart's relative |
| Sandcastle feature |
| Modern zoo barrier |
| Castle's protector |
| Medieval protection |
| Animal park barrier |
| Old security device |
| Palatial protection |
| Fortress protection |
| Middle Ages defense |
| Middle Ages barrier |
| Castle's protection |
| Water-filled trench |
| Feature of some zoos |
| Castle's watery ring |
| Torquilstone defense |
| Trench around a fort |
| Water round a castle |
| Watery fortification |
| Zoo barrier, perhaps |
| Castle water barrier |
| Fortification ditch. |
| Ring around a castle |
| Castle fortification |
| Castle or zoo barrier |
| Castle-circling ditch |
| Castle's surroundings |
| Certain siege defense |
| Thing around a castle |
| A drawbridge spans it |
| Water around a castle |
| Water under the bridge |
| Castle security system |
| Defensive castle ditch |
| Ditch around a castle. |
| Fortress fortification |
| Means of defense, once |
| Protective zoo feature |
| View from a drawbridge |
| Water hazard of a sort |
| Water with no endpoint |
| Zoo barrier, sometimes |
| Alternative to a fence |
| Medieval fortification |
| Ring around the castle |
| Asset in a castle siege |
| Barrier in a modern zoo |
| Castle-visitor's hurdle |
| Castle's watery defense |
| Defense against a siege |
| Feature of a modern zoo |
| Item under a drawbridge |
| Ditch used as a defence |
| Old means of protection |
| Trench around a castle. |
| Watery defense, perhaps |
| Zoo's fence alternative |
| Zoo landscaping feature |
| Tower of London feature |
| A drawbridge may span it |
| Castle's defensive ditch |
| Castle's non-welcome mat |
| Certain barrier to entry |
| Ditch under a drawbridge |
| Medieval security device |
| Old-time security system |
| Onetime means of defense |
| Medieval security system |
| Castle's water protection |
| Ditch at a ducal domicile |
| Medieval attack deterrent |
| Trench under a drawbridge |
| Wall alternative, perhaps |
| A drawbridge may span one |
| A drawbridge may cross one |
| Castle's protective device |
| Drawbridge's raison d'etre |
| Dry Windsor Castle feature |
| Feature in an open-air zoo |
| Part of a castle's defense |
| Castle's perimeter defense |
| Water under the drawbridge |
| Advanced sandcastle feature |
| A drawbridge might span one |
| Castle encircler, sometimes |
| Castle's protective feature |
| Defense that may be all wet |
| Hazard for a castle invader |
| It's water under the bridge |
| Medieval invader's obstacle |
| Part of a castle's defenses |
| Battering-ram countermeasure |
| Castle's watery surroundings |
| Defense against siege towers |
| Sandcastle feature, at times |
| Ditch dug to protect a castle |
| Pest control device in bonsai |
| They usually encircle castles |
| Trench around a fortification |
| Water barrier around a castle |
| Water-filled defensive trench |
| What a drawbridge might cover |
| Trench crossed by a drawbridge |
| Safety feature for zoo visitors |
| Defensive trench around a castle |
| Ditch under a lowered drawbridge |
| Home to a zoo crocodile, perhaps |
| Former Tower of London surrounder |
| It may replace a fence at the zoo |
| Onetime Tower of London surrounder |
| Body of water surrounding a castle |
| Water-filled ditch around a castle |
| Feature of Japan's Matsumoto Castle |
| Feature of the Tokyo Imperial Palace |
| Means of protection against invasion |
| It surrounded the Wicked Witch's home |
| Deterrent for would-be castle-stormers |
| Water that surrounded a medieval castle |
| Water-filled trench surrounding a castle |
| Ditch that might be filled with alligators |
| Defensive trench that might include alligators |
| Water-filled ditch that might include crocodiles |
| Defensive ditch that goes around the Tower of London |