IDIE

Set to 3 different clues across 6 published puzzles, most often “Romeo's last words” — The New York Times, Sunday, 16 December 2007.

4 letters

Every clue on record, most used first

Romeo's last words4 times
The New York Times — Sunday, 16 December 2007
"And When ___," 1969 Blood, Sweat & Tears hitonce
The New York Times — Thursday, 20 May 2010
"And if ___ before ..."once
The New York Times — Wednesday, 2 October 2002