Return match (11)
I believe the answer is:
reciprocate
This clue is a double definition.
'return' is the first definition.
(I know that return is a more specific form of the action reciprocate)
'match' is the second definition.
(thesaurus)
(Other definitions for reciprocate that I've seen before include "Interchange" , "Do something in return" , "Return (love/affection)" , "make fair return" , "Respond" .)