Buzz from the endless drink (5)
I believe the answer is:
thrum
'buzz' is the definition.
(thesaurus)
'the endless drink' is the wordplay.
'endless' means to remove the last letter.
'drink' becomes 'rum' (I've seen this before).
'the' with its last letter taken away is 'th'.
'th'+'rum'='THRUM'
'from' is the link.
(Other definitions for thrum that I've seen before include "Drum with fingers - bits of coarse yarn" , "Strum monotonously" , "Fringe, tassel of unwoven threads" , "Make a rhythmic humming sound" , "end of yarn" .)