Filed from 2 published puzzles

GOEASY

Set to 2 different clues across 2 published puzzles, most often “Have mercy (on)” — The New York Times, Sunday, 15 June 2008.

6 letters

Every clue on record, most used first

Have mercy (on)once
The New York Times — Sunday, 15 June 2008
Let uponce
The New York Times — Friday, 16 May 1997

Other answers to these clues

ABATE5 letters
ABATED6 letters
CEASE5 letters
EASE4 letters
EASED5 letters
EASEDOFF8 letters
EASEOFF7 letters
LESSEN6 letters
SLACKEN7 letters
SPARE5 letters
WANED5 letters