The answers to the following clues will have something in common:

1. Federal subsidy
2. Vacuum cleaner
3. Alaskan peak
4. Cat in the comics
5. New York Avenue
6. Hollywood movie icon

Answers:

1. GRANT
2. HOOVER
3. McKINLEY
4. GARFIELD
5. MADISON
6. MONROE

All are US Presidents.

Credit: LA Times Crossword
Sylvia Burstzyn and Barry Tunick
HAIL TO THE CHIEF