Return to surrender (5)
I believe the answer is:
yield
This clue is a double definition.
'return' is the first definition.
(I know that return can be written as yield)
'surrender' is the second definition.
(yield can mean to give up or surrender)
'to' is the link.
(Other definitions for yield that I've seen before include "earnings" , "Give away - return - grant" , "Generate (return)" , "Stop defending" , "amount of energy from 14 [EXPLOSION]" .)