IFORGET

Set to 2 different clues across 2 published puzzles, most often "Hmmm, it's not coming to me" — The New York Times, Wednesday, 23 February 2000.

7 letters

Every clue on record, most used first

"Hmmm, it's not coming to me"once
The New York Times — Wednesday, 23 February 2000
"Slips my mind"once
The New York Times — Wednesday, 8 December 1999