One may carry drink (6)
I believe the answer is:
porter
This clue is a double definition.
'one may carry' is the first definition.
(a porter carries things around)
'drink' is the second definition.
(porter is a kind of drink)
(Other definitions for porter that I've seen before include "He should be able to carry" , "Baggage-handler" , "One fetches and carries the drink" , "Dark beer; carrier" , "One with a burden" .)