Half of Reds in time for match (5)
I believe the answer is:
agree
'match' is the definition.
(agreeing is a kind of matching)
'half of reds in time for' is the wordplay.
'half of' suggests halving the letters.
'in' indicates putting letters inside.
'time for' becomes 'age' (I've seen this in other clues).
'reds' cut in half is 're'.
're' put into 'age' is 'AGREE'.
(Other definitions for agree that I've seen before include "Consent required" , "Arrive at a settlement" , "Have the same opinion" , "Go along with" , "Be of one mind" .)