Expel in complete victory (5)
I believe the answer is:
evict
'expel' is the definition.
(I know this)
'in complete victory' is the wordplay.
'in' indicates a hidden word.
'EVICT' can be found hidden inside 'complete victory'.
(Other definitions for evict that I've seen before include "Civet (anag.)" , "Expel (from property)" , "Turf out" , "Throw from the premises" , "Throw out (from home)" .)