Group drinks stout (5)
I believe the answer is:
round
I believe this clue is a double definition.
'group drinks' is the first definition.
(drinks for a group of people)
'stout' is the second definition.
(I've seen this before)
(Other definitions for round that I've seen before include "single slice of bread!" , "... entire" , "Circular - spherical" , "Drinks order" , "balls are like this" .)