Cheery drink (7)
I believe the answer is:
cordial
I believe this clue is a double definition.
'cheery' is the first definition.
(thesaurus)
'drink' is the second definition.
(cordial is a kind of drink)
(Other definitions for cordial that I've seen before include "Agreeable - drink" , "Pleasant - soft drink" , "Hearty - drink" , "Affable type of sweet drink?" , "Warmly welcoming to the drink" .)