BARITONES

Set to 3 different clues across 3 published puzzles, most often “Singing voices in the 17-Across” — The New York Times, Thursday, 23 September 2010.

9 letters

Every clue on record, most used first

Singing voices in the 17-Acrossonce
The New York Times — Thursday, 23 September 2010
Figaro and othersonce
The New York Times — Sunday, 26 October 2003
Opera cast membersonce
The New York Times — Friday, 6 June 1997