EOLITHS

Set to 3 different clues across 3 published puzzles, most often “Prehistoric stone chips” — The New York Times, Saturday, 11 February 2006.

7 letters

Every clue on record, most used first

Prehistoric stone chipsonce
The New York Times — Saturday, 11 February 2006
Chipped stones of archeological interestonce
The New York Times — Saturday, 13 July 1996
Anceint flintsonce
The New York Times — Saturday, 18 March 1995