The following drink (6)
I believe the answer is:
chaser
'drink' is the definition.
(as in a shot and chaser)
'the following' is the wordplay.
I cannot really see how this works, but
'following' could be 'chase' (synonyms) and 'chase' is present in the answer.
A single letter 'r' remains which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for chaser that I've seen before include "Huntsman" , "Milder drink taken after a stronger one" , "second drink" , "Drink following another of a different kind" , "Hunter; drink" .)