| Brain-scan letters |
| All, e.g., for this answer's last six letters? |
| Banished to sleep on a couch, say ... or where to find the starred answers' hidden items |
| ___ the world (asleep) |
| Archaeologist's letters |
| Annual cause of losing an hr.'s sleep hidden in this puzzle's 10 longest answers |
| Bellini's sleepwalker |
| Organizations with Greek letters |
| Amtrak sleeping compartments |
| Sleepy John ___ (blues guitarist) |
| Confusing statements ... and a hint to the circled letters |
| Acted sleepy |
| Feeling sleepy |
| Start of a sleeper's observation |
| Sleep preventer |
| Surprises unpleasantly, and a hint to each starred answer's first two + last two letters |
| Accompaniers of cover letters: Abbr. |
| Attend a party uninvited ... and a literal hint to five sets of circled letters |
| Adjust space between letters, in printing |
| Sleepy baker's equipment? |
| Late sleeper's comment to a nagging partner |
| Whatever it takes ... as hinted at in the arrangements of black squares around the circled letters |
| Personal letters |
| Letters from the family? |
| Retirement plan letters |
| Bounced-check letters |
| Sleep lab detection |
| Sleeper's malady |
| Letters preceding an assumed name |
| ICU instruction letters |