Filed from 3 published puzzles

INSULATE

Set to 2 different clues across 3 published puzzles, most often “Set apart” — The New York Times, Saturday, 1 May 1999.

8 letters

Every clue on record, most used first

Set apart2 times
The New York Times — Saturday, 1 May 1999
Wrap in fiberglassonce
The New York Times — Tuesday, 20 September 2005

Other answers to these clues

ALLOT5 letters
ALONE5 letters
ENISLE6 letters
ISOLATE7 letters
LONE4 letters