Famous clown given a drink (5)
I believe the answer is:
cocoa
'drink' is the definition.
(I know that cocoa is a type of drink)
'famous clown given a' is the wordplay.
'famous clown' becomes 'coco' (Coco the Clown, 20th-century clown).
'given' says to put letters next to each other.
'coco'+'a'='COCOA'
(Other definitions for cocoa that I've seen before include "Powdered cacao seeds" , "Popular chocolate drink" , "Late-night drink" , "drink from beans" , "Powder from cacao beans" .)