Raise army to capture Italy (5)
I believe the answer is:
hoist
'raise' is the definition.
(hoisting is a kind of raising)
'army to capture italy' is the wordplay.
'army' becomes 'host' (I've seen this before).
'to capture' is an insertion indicator.
'italy' becomes 'i'.
'host' going around 'i' is 'HOIST'.
(Other definitions for hoist that I've seen before include "Lift using pulley and ropes" , "Raise aloft" , "Lift with rope and pulley" , "Come down" , "Raise with ropes" .)