Star performer, groom? (3,2,3,5)
I believe the answer is:
man of the match
I believe this clue is a double definition.
'star performer' is the first definition.
'groom?' is the second definition.
(I've seen this before)
(Other definitions for man of the match that I've seen before include "Star of the fixture" , "Person voted the most valuable player in a game" , "Groom" , "footballer for award?" , "One adjudged best player" .)