Filed from 4 published puzzles

KEPTATIT

Set to 3 different clues across 4 published puzzles, most often “Persisted” — The New York Times, Monday, 25 July 2005.

8 letters

Every clue on record, most used first

Persisted2 times
The New York Times — Monday, 25 July 2005
Perseveredonce
The New York Times — Thursday, 10 February 2011
Didn't throw in the towelonce
The New York Times — Sunday, 5 December 1999

Other answers to these clues

CARRIEDON9 letters
ENDURED7 letters
HUNGON6 letters
STAYEDTHECOURSE15 letters