Flamboyant winger and token supporter of match (4,3)

I believe the answer is:

best man

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'supporter of match' is the definition.
'best man' can be an answer for 'supporter' (best man is a kind of supporter). I'm unsure of the 'of match' bit.

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for best man that I've seen before include "Supporting male actor at a wedding" , "Bridegroom's friend" , "Principal groomsman at a wedding" , "Bridegroom's mate" , "Key union facilitator r" .)

I've seen this clue in The Times.

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