Returned support (4)
I believe the answer is:
back
I believe this clue is a double definition.
'returned' is the first definition.
(I've seen this in other clues)
'support' is the second definition.
(to back is to support or endorse)
(Other definitions for back that I've seen before include "Support - rear" , "Stern" , "ago" , "bet" , "Support a play - player" .)