| Brain-scan letters | 
                        
                | All, e.g., for this answer's last six letters? | 
                        
                | Archaeologist's 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. | 
                        
                | Adjust space between letters, in printing | 
                        
                | Letters from the family? | 
                        
                | Retirement plan letters | 
                        
                | Personal letters | 
                        
                | Bounced-check letters | 
                        
                | Whatever it takes ... as hinted at in the arrangements of black squares around the circled letters | 
                        
                | ICU instruction letters | 
                        
                | Letters preceding an assumed name | 
                        
                | Artistic place for tiny letters? | 
                        
                | Monogram on some pricey handbags | 
                        
                | Filling station letters? | 
                        
                | With "a," someone undesirable ... and what's found in the circled letters? | 
                        
                | Alternate identity letters | 
                        
                | And so forth" letters | 
                        
                | Agrarian structure, and a hint to the circled letters | 
                        
                | Memo letters for "I need it now! | 
                        
                | Uppercase letters, for short | 
                        
                | Adjust spacing between letters, in printing | 
                        
                | Cyber-opinion letters | 
                        
                | Letters of Calvary | 
                        
                | Rap sheet letters hidden in this puzzle's longest answers | 
                        
                | Missing letters? |