Carry off old drunk? (4)
I believe the answer is:
wino
'drunk?' is the definition.
(I know that drunk can be written as wino)
'carry off old' is the wordplay.
'carry off' becomes 'win' (I've seen this in another clue).
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'win'+'o'='WINO'
(Other definitions for wino that I've seen before include "Street drunkard" , "Alcoholic" , "Toper" , "Habitual drunkard" , "Down-and-out drunkard" .)