The vessel for a final drink? (3)
I believe the answer is:
cup
I believe this clue is a triple definition!
'the vessel' is the first definition.
(cup is a type of vessel)
'for' is a link.
'a final' is the second definition.
(cup final is a kind of final)
'drink?' is the third definition.
(a cup of drink)
(Other definitions for cup that I've seen before include "Container to drink from - prize" , "Trophy; drinking vessel" , "Chalice; trophy" , "McCarthy, Walker or Maguire" , "Beaker" .)