Brandy may see study going west! (4)
I believe the answer is:
marc
'brandy' is the definition.
(I know that marc is a type of brandy)
'study going west' is the wordplay.
'study' becomes 'cram' (cramming is a kind of studying).
'going west' shows that the letters should be reversed in order (letters heading to the west or left).
'cram' back-to-front is 'MARC'.
'may see' is the link.
(Other definitions for marc that I've seen before include "Cram (anag.)" , "Brandy distilled from grape residue" , "Type of eau-de-vie made from residue of grapes" , "Fruit refuse" , "Brandy made from fruit-refuse" .)