Beer after bourbon, say (6)
I believe the answer is:
chaser
'beer after bourbon say' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for chaser that I've seen before include "engraver" , "Follow-up drink" , "Milder drink taken after a stronger one" , "Drink following another of a different kind" , "Pursuit cannon; one engraving" .)