Produce or give up (5)
I believe the answer is:
yield
I believe this clue is a double definition.
'produce' is the first definition.
(I know that yield is a more specific form of the action produce)
'give up' is the second definition.
(I've seen this before)
'or' is the link.
(Other definitions for yield that I've seen before include "Stop defending" , "Income" , "Relinquish" , "Give way; produce" , "Produce as harvest or surrender" .)