CMAJOR

Set to 2 different clues across 2 published puzzles, most often “It's all ivory and no ebony” — The New York Times, Friday, 10 September 2010.

6 letters

Every clue on record, most used first

It's all ivory and no ebonyonce
The New York Times — Friday, 10 September 2010
Key of Sibelius' Symphony No. 7once
The New York Times — Sunday, 4 December 1994