Enemy captive (8,2,3)
I believe the answer is:
prisoner of war
'enemy captive' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for prisoner of war that I've seen before include "Captured member of enemy forces" , "POW in full" , "Captured soldier" , "Enemy captive" , "E.g. Stalag inmate" .)