Bond's boss cast him out in one-sided contest (8)

I believe the answer is:

mismatch

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But I can't explain it at all! Could you help me understand?

(Other definitions for mismatch that I've seen before include "Two objects, or people, that don't go together" , "Mac Smith (anag.)" , "Incompatibility" , "Discrepancy" , "massively uneven contest" .)

I've seen this clue in The Sun.

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