Town lad endlessly lacking in refinement (7)
I believe the answer is:
borough
'town' is the definition.
(borough is a kind of town)
'lad endlessly lacking in refinement' is the wordplay.
'lad' becomes 'boy' (I've seen this before).
'endlessly' means to remove the last letter.
'lacking in refinement' becomes 'rough'.
'boy' with its final letter taken away is 'bo'.
'bo'+'rough'='BOROUGH'
(Other definitions for borough that I've seen before include "Administrative division of a large city" , "Region of London" , "Administrative area" , "Local district" , "Administrative unit in a city, Dun Laoghaire in Dublin, say" .)