Female match assistant? (10)
I believe the answer is:
bridesmaid
'assistant?' is the definition.
(bridesmaid is a kind of assistant)
'female match' is the wordplay.
I cannot quite see how this works, but
'female' could be 'maid' (maid is a kind of female) and 'maid' is present in the answer.
'match' could be 'bride' (bride is a kind of match) and 'bride' is found in the answer.
A single letter 's' remains which might be clued in a way I don't see.
This explanation may well be incorrect...
(Other definitions for bridesmaid that I've seen before include "one's holding up train perhaps" , "match participant" , "Attendant at wedding" .)