Filed from 3 published puzzles

DETERIORATE

Set to 3 different clues across 3 published puzzles, most often “Go downhill” — The New York Times, Friday, 15 December 2006.

11 letters

Every clue on record, most used first

Go downhillonce
The New York Times — Friday, 15 December 2006
It has "rot" and "die" insideonce
The New York Times — Tuesday, 24 July 2001
Waste awayonce
The New York Times — Thursday, 8 March 2001

Other answers to these clues

ATROPHY7 letters
FRITTER7 letters
SLED4 letters
WANE4 letters
WORSEN6 letters