A person under discussion; a question of which person.
(interrogative) What person or people; which person or people; asks for the identity of someone. (used in a direct or indirect question) Example: I don't know who it is. (indirect question)
(interrogative) What is one's position; asks whether someone deserves to say or do something. Example: I don't like what you did, but who am I to criticize you? I've done worse.
(relative) The person or people that.
(relative) Whoever, he who, they who. Example: It was a nice man who helped us.
All clues having "WHO"
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You can find a list of possible crossword clues for WHO below.