The score to win by in the cold season (3)

I believe the answer is:

try

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'the score' is the definition.

I don't understand the rest of the clue.

(Other definitions for try that I've seen before include "crack" , "Gorse" , "Attempt; smooth (wood)" , "A rugby score, result of effort" , "Examine" .)

I've seen this clue in the Evening Standard.

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