Filed from 3 published puzzles

OHREALLY

Set to 3 different clues across 3 published puzzles, most often "You don't say!" — The New York Times, Friday, 22 February 2008.

8 letters

Every clue on record, most used first

"You don't say!"once
The New York Times — Friday, 22 February 2008
"No kidding!"once
The New York Times — Friday, 30 July 2004
"Is that so?"once
The New York Times — Friday, 21 February 2003

Other answers to these clues

AREYOUSINCERE13 letters
DOTELL6 letters
GEE3 letters
GOSH4 letters
HONEST6 letters
IKNOW5 letters
IMEANIT7 letters
INDEED6 letters
ISTHATSO8 letters
ITSAFACT8 letters
REALLY6 letters
THATSO6 letters