| Initials on a bounced check |
| You might draw them when answering questions |
| A check inside? (Abbr.) |
| Something to check |
| Action needed to spot the four fliers in the theme answers |
| Activity suggested by this puzzle's theme entries |
| Checkup performers |
| A WWI song urged us to keep them burning |
| Partially obscured (and a hint to this puzzle's theme) |
| A checkered one is waved at the end of an auto race |
| Adele won five of them in February |
| Anathema, to Polonius |
| About 57 degrees, mathematically |
| Mathematician's ordinal |
| Lone Ranger's theme composer |
| Bodybuilder's theme song? |
| Miss Marple finds them |
| Bounced-check letters |
| Fabergé jeweled them |
| Annoying obligations / "No need to check" [split] |
| Container holding slips of paper with tasks written on them |
| Asleep ... or a hint to this puzzle's theme |
| Airport check-in freebie |
| Alternative words used as alternatives for each other in this puzzle's theme answers |
| African American mathemetician who purportedly surveyed the District of Columbia |
| One who checks your canines: Abbr. |
| Contract extras, and read differently, a hint to this puzzle's theme |
| Paper deliverers have them: Abbr. |
| Behave!" ... and a hint to this puzzle's theme |
| According to the '60s sitcom's theme song: "It's primitive as can be ... here on ___": 2 wds. |