ALAN

Set to 98 different clues across 156 published puzzles, most often “Mathematician Turing” — The New York Times, Wednesday, 23 March 2011.

4 letters

Every clue on record, most used first

Mathematician Turing11 times
The New York Times — Wednesday, 23 March 2011
King of comedy7 times
The New York Times — Sunday, 20 April 2008
Chester Arthur's middle name6 times
The New York Times — Monday, 8 March 2010
Astronaut Shepard6 times
The New York Times — Wednesday, 26 March 2003
Lawyer Dershowitz4 times
The New York Times — Monday, 23 June 2008
Astronaut Bean4 times
The New York Times — Wednesday, 20 June 2001
Shepard in space3 times
The New York Times — Tuesday, 21 December 2010
The "A" in Chester A. Arthur3 times
The New York Times — Tuesday, 21 April 2009
Playwright Ayckbourn3 times
The New York Times — Friday, 7 December 2007
Broadway's ___ Jay Lerner3 times
The New York Times — Wednesday, 6 June 2007
Presidential middle name3 times
The New York Times — Saturday, 12 November 2005
Rock 'n' roll pioneer Freed3 times
The New York Times — Wednesday, 12 March 2003