Return and accept support (4,4)
I believe the answer is:
take back
'return' is the definition.
('take back' can be a synonym of 'return')
'accept support' is the wordplay.
'accept' becomes 'take' (taking is a kind of accepting).
'support' becomes 'back' (back is a kind of support**).
'take'+'back'='TAKE BACK'
'and' is the link.
(Other definitions for take back that I've seen before include "Recapture" , "Retract statement or return goods" , "revoke" .)