Clown with a drink (5)
I believe the answer is:
cocoa
'drink' is the definition.
(I know that cocoa is a type of drink)
'clown with a' is the wordplay.
'clown' becomes 'coco' (Nicolai Poliakoff aka Coco the Clown).
'with' says to put letters next to each other.
'coco'+'a'='COCOA'
(Other definitions for cocoa that I've seen before include "brown powder" , "Hot beverage" , "Nighttime drink" , "product of beans!" , "Main constituent of chocolate" .)