AYER

Set to 4 different clues across 4 published puzzles, most often “Yesterday, in the Yucatán” — The New York Times, Wednesday, 24 March 2010.

4 letters

Every clue on record, most used first

Yesterday, in the Yucatánonce
The New York Times — Wednesday, 24 March 2010
Philosopher who promoted logical positivismonce
The New York Times — Saturday, 29 November 2008
Mañana's oppositeonce
The New York Times — Saturday, 10 February 2001
Philosopher A.J. _____once
The New York Times — Monday, 12 September 1994