Filed from 3 published puzzles

WELLYES

Set to 3 different clues across 3 published puzzles, most often "Actually, it's true" — The New York Times, Friday, 18 December 2009.

7 letters

Every clue on record, most used first

"Actually, it's true"once
The New York Times — Friday, 18 December 2009
"Actually, you're right"once
The New York Times — Friday, 1 September 2006
"Of course!"once
The New York Times — Saturday, 9 October 2004

Other answers to these clues

AHA3 letters
BYALLMEANS10 letters
CERTAINLY9 letters
DEFINITELY10 letters
DUH3 letters
ISEE4 letters
NATCH5 letters
SURELY6 letters
SURETHING9 letters
TOBESURE8 letters
WITHOUTQUESTION15 letters
YES3 letters