Have a fling before the match? (4)

I believe the answer is:

toss

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'have a fling' is the definition.
(I've seen this in another clue)

I cannot understand how the remainder of the clue works.

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(Other definitions for toss that I've seen before include "ball" , "Throw into the air" , "Raise a little money" , "Ditch" , "Flip in the air, sald or coin" .)

I've seen this clue in the Evening Standard.

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