Skid row sort (4)
I believe the answer is:
wino
'skid row sort' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for wino that I've seen before include "Alcoholic" , "Down-and-out drunkard" , "Big drinker" , "one given to bibulousness" , "Habitual drunkard" .)