Crossword Genius

He's not a star but more (5)

Ross

I believe the answer is:

extra

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

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for extra that I've seen before include "E.g. wide in cricket" , "Auxiliary" , "23 player?" , "person in shot?" , "more than required" .)

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