Crossword Genius

Dentine; piano key (5)

Ross

I believe the answer is:

ivory

I believe this clue is a double definition.

'dentine' is the first definition.
(ivory is a kind of dentine)

'piano key' is the second definition.
(I've seen this before)

(Other definitions for ivory that I've seen before include "Off-white colour" , "Cream" , "Jumbo's dentine" , "What may be carved" , "What tusks are made of" .)

I've seen this clue in The Guardian.
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