| Brain-scan letters |
| Archaeologist's letters |
| All, e.g., for this answer's last six letters? |
| Organizations with Greek letters |
| Confusing statements ... and a hint to the circled letters |
| Attend a party uninvited ... and a literal hint to five sets of circled letters |
| Surprises unpleasantly, and a hint to each starred answer's first two + last two letters |
| Accompaniers of cover letters: Abbr. |
| Letters from the family? |
| Adjust space between letters, in printing |
| Bounced-check letters |
| Slogan on a '50s red-white-and-blue button |
| Because Freedom Can't Protect Itself" sloganeer, briefly |
| Whatever it takes ... as hinted at in the arrangements of black squares around the circled letters |
| Retirement plan letters |
| Personal letters |
| Slogan |
| ICU instruction letters |
| Cracker with the slogan "Get Your Own Box |
| Letters preceding an assumed name |
| Artistic place for tiny letters? |
| Give Schweppes Ginger ___ try!" (brilliant soda slogan I just made up) (this clue dedicated to the great Merl Reagle, the master of saving weak entries; RIP, Merl) |
| Filling station letters? |
| With "a," someone undesirable ... and what's found in the circled letters? |
| Slogan for a down-and-out Indiana city trying to attract creative types? |
| Alternate identity letters |
| And so forth" letters |
| Agrarian structure, and a hint to the circled letters |
| Uppercase letters, for short |
| Memo letters for "I need it now! |