OZMA

Set to 4 different clues across 6 published puzzles, most often “Baum princess” — The New York Times, Thursday, 16 June 2011.

4 letters

Every clue on record, most used first

Baum princess3 times
The New York Times — Thursday, 16 June 2011
Princess in L. Frank Baum booksonce
The New York Times — Monday, 20 December 2010
Princess of literatureonce
The New York Times — Sunday, 22 March 2009
Emerald City princessonce
The New York Times — Thursday, 26 May 1994