Surrender, as territory (4)
I believe the answer is:
cede
'surrender as territory' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for cede that I've seen before include "Surrender or grant" , "Surrender or relinquish possession" , "Give up (territory)" , "Give up (eg, power)" , "Give up rights or possession" .)