Harbour resentment, being gutted after review of work (4)
I believe the answer is:
port
'harbour' is the definition.
(I've seen this before)
'resentment being gutted after review of work' is the wordplay.
'being gutted' suggests removing the centre (to gut something is to remove its insides).
'after' says to put letters next to each other.
'review of' says the letters should be written in reverse.
'work' becomes 'op' (abbreviation for opus).
'resentment' with its centre taken out is 'rt'.
'op' back-to-front is 'po'.
'rt' after 'po' is 'PORT'.
(Other definitions for port that I've seen before include "where one would expect water" , "Anchorage" , "Drink - left at sea" , "E.g. five [SWANSEA]" , "Bordeaux, say" .)