Crossword Genius

Piano keys, informally (7)

Ross

I believe the answer is:

ivories

(Other definitions for ivories that I've seen before include "champers" , "Joanna's bits to tickle" , "Piano keys; teeth (slang)" , "What Liberace played" , "Tinkle them on the piano" .)

I've seen this clue in The Wall Street Journal.
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