Drinker’s paunch (4,5)
I believe the answer is:
beer belly
'drinker's paunch' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for beer belly that I've seen before include "Spare tyre due to consumption of alcohol" , "Corporation" , "Drinker's paunch" , "Protuberant stomach" , "Spare tyre from drinking ale" .)