Winner perhaps has a supporting role at the match (3,4,3)

'winner' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe you can see an association between them that I don't see?

'has a supporting role at the match' is the wordplay.
I cannot really see how this works, but
'a' could be 'an' and 'an' is found in the answer.
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is found within the answer.
This explanation may well be incorrect...

'perhaps' is the link.

Can you help me to learn more?