BIL

Set to 3 different clues across 11 published puzzles, most often “Cartoonist Keane” — The New York Times, Sunday, 27 July 2008.

3 letters

Every clue on record, most used first

Cartoonist Keane7 times
The New York Times — Sunday, 27 July 2008
"The Family Circus" cartoonist Keane2 times
The New York Times — Sunday, 1 May 2011
Puppeteer Baird2 times
The New York Times — Sunday, 8 September 2002