Contestant who simply can't go another round (8)

I believe the answer is:

finalist

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'contestant' is the definition.
(I know that finalist is a type of contestant)

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for finalist that I've seen before include "Competitor who reaches the last stage" , "Participant in the last round of a competition" , "One at decisive stage" , "He qualified" , "possible winner" .)

I've seen this clue in the Evening Standard.

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