Filed from 3 published puzzles

PSHAWS

Set to 3 different clues across 3 published puzzles, most often “Expresses disbelief” — The New York Times, Sunday, 14 November 2010.

6 letters

Every clue on record, most used first

Expresses disbeliefonce
The New York Times — Sunday, 14 November 2010
Scornful dismissalsonce
The New York Times — Saturday, 29 March 2008
Poohsonce
The New York Times — Saturday, 15 February 2003