Attire for important woman at the match (7,5)
I believe the answer is:
wedding dress
'the match' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe you can see an association between them that I don't see?
'attire for important woman' is the wordplay.
'attire' becomes 'dress' ('dress' can be a synonym of 'attire').
'for' says to put letters next to each other (I've seen this in other clues).
'important woman' becomes 'wedding' (I can't explain this - if you can you should believe this answer much more).
'dress' after 'wedding' is 'WEDDING-DRESS'.
'at' is the link.
(Another definition for wedding dress that I've seen is " Bride's attire".)