UNIQUE
Set to 5 different clues across 5 published puzzles, most often “Singular” — The New York Times, Sunday, 27 March 2011.
6 letters
Every clue on record, most used first
- Singularonce
The New York Times — Sunday, 27 March 2011
- Peerlessonce
The New York Times — Sunday, 2 April 2000
- More than unusualonce
The New York Times — Tuesday, 21 March 2000
- Rarer than rareonce
The New York Times — Thursday, 5 August 1999
- Unparalleledonce
The New York Times — Sunday, 16 June 1996