Drunkard in row in off-licence (4)
I believe the answer is:
wino
'drunkard' is the definition.
(I know that drunkard can be written as wino)
'in row in off-licence' is the wordplay.
'in' says the answer is hidden in the clue.
'WINO' is hidden within 'row in off licence'.
(Other definitions for wino that I've seen before include "Alcoholic" , "heavy drinker" , "As a dipso" , "Habitual drunkard" , "Big drinker" .)