Filed from 2 published puzzles

TOPPER

Set to 2 different clues across 2 published puzzles, most often “High hat” — The New York Times, Thursday, 10 May 2001.

6 letters

Every clue on record, most used first

High hatonce
The New York Times — Thursday, 10 May 2001
Formal hat, informallyonce
The New York Times — Wednesday, 18 March 1998

Other answers to these clues

MITER5 letters
SNOOT5 letters
SNOOTY6 letters
SNUB4 letters
STOVEPIPE9 letters
STUCKUP7 letters