Crossword Genius

Question of identity (3)

Ross

I believe the answer is:

who

'question of identity' is the definition.
('who' is used to ask about someone's identity)

This is all the clue.

(Other definitions for who that I've seen before include "Question of identity" , "The - - , rock legends" , "Which people" , "medical experts" , "Doctor --, TV series" .)

I've seen this clue in The Times, The Wall Street Journal, The Sunday Times, the LA Times, the Universal and the King Feature Syndicate.
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