Drink in a group (4)
I believe the answer is:
bevy
'drink' is the definition.
(short for beverage)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for bevy that I've seen before include "many girls" , "Group of birds or girls" , "Assemblage" , "female company?" , "Group (of larks, ladies etc)" .)