Leaves for a drink (3)
I believe the answer is:
tea
This clue is a double definition.
'leaves' is the first definition.
(as in tea leaves)
'a drink' is the second definition.
(tea is a drink)
'for' is the link.
(Other definitions for tea that I've seen before include "Evening meal - eat up" , "Infused leaves" , "Hot drink" , "Sort of garden, chest or service" , "Cha" .)