Filed from 4 published puzzles

IRONOUT

Set to 2 different clues across 4 published puzzles, most often “Smooth” — The New York Times, Friday, 18 March 2011.

7 letters

Every clue on record, most used first

Smooth2 times
The New York Times — Friday, 18 March 2011
Resolve, as differences2 times
The New York Times — Tuesday, 5 April 2005

Other answers to these clues

CREAMY6 letters
EASE4 letters
EASY4 letters
EVEN4 letters
FACILE6 letters
FILE4 letters
FLOWING7 letters
FLUENT6 letters
GLASSY6 letters
GLIB4 letters
IRON4 letters
PAVE4 letters