Filed from 3 published puzzles

FASTEN

Set to 3 different clues across 3 published puzzles, most often “Snap a snap on, say” — The New York Times, Friday, 8 April 2011.

6 letters

Every clue on record, most used first

Snap a snap on, sayonce
The New York Times — Friday, 8 April 2011
Buckleonce
The New York Times — Wednesday, 3 July 2002
Fixonce
The New York Times — Thursday, 6 October 1994

Other answers to these clues

ALTER5 letters
AMEND5 letters
ASSIGN6 letters
CURE4 letters
DEFINE6 letters
EATHUMBLEPIE12 letters
EMEND5 letters
GIVE4 letters
INA3 letters
JAM3 letters
KNUCKLEUNDER12 letters
MEND4 letters