Prison in west Iraq (4)
I believe the answer is:
stir
'prison' is the definition.
(informal term for prison)
'in west iraq' is the wordplay.
'in' indicates the answer is hidden within the clue.
'STIR' is hidden within 'west iraq'.
(Other definitions for stir that I've seen before include "Affect emotionally" , "Mix or agitate" , "Disturb" , "Move around - prison" , "What keeps those inside" .)