Announcer on the radio for match (7)
I believe the answer is:
compare
'match' is the definition.
(thesaurus)
'announcer on the radio' is the wordplay.
'announcer' becomes 'compere'.
'on the radio' shows a homophone (sound like).
'compere' sounds like 'COMPARE'.
'for' is the link.
(Other definitions for compare that I've seen before include "what discriminators do" , "Represent as similar; sounds like emcee" , "Contrast - liken" , "Look at differences and similarities between (things)" .)