Crossword Genius

He has to be what he is (5)

Ross

I believe the answer is:

owner

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'he has' is the definition.
(I've seen this before)

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for owner that I've seen before include "Title holder?" , "Holder, possessor" , "possessive type" , "Person having property" , "Person with legal title to something" .)

I've seen this clue in The Globe and Mail.
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