Drink that's part of each afternoon (3)
I believe the answer is:
cha
'drink' is the definition.
(cha can mean tea)
'part of each afternoon' is the wordplay.
'part of' indicates the answer is hidden within the clue.
'CHA' is hidden within 'each afternoon'.
'that's' acts as a link.
(Other definitions for cha that I've seen before include "Tea (colloquial)" , "Tea (informal)" , "not allowed in ski lodge" , "Tea (colloq.)" , "drink" .)