Filed from 3 published puzzles

ONLAY

Set to 3 different clues across 3 published puzzles, most often “Canine topper” — The New York Times, Saturday, 3 September 2005.

5 letters

Every clue on record, most used first

Canine topperonce
The New York Times — Saturday, 3 September 2005
It's a reliefonce
The New York Times — Sunday, 9 March 2003
Dental restorationonce
The New York Times — Sunday, 26 February 1995

Other answers to these clues

ASPIRIN7 letters
RECESS6 letters