He doesn't give up easily for a judge, perhaps? (5)

I believe the answer is:

trier

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'for a judge perhaps?' is the definition.
(I've seen this before)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for trier that I've seen before include "Persistent type" , "One has a crack" , "One who doesn't give up - judge?" , "European city" , "Tester, juror" .)

I've seen this clue in The Irish Independent.

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