Strong drink makes bishop up for it (6)
I believe the answer is:
brandy
'strong drink' is the definition.
(brandy is a kind of strong drink)
'bishop up for it' is the wordplay.
'bishop' becomes 'b' (abbreviation used in chess).
'up for it' becomes 'randy' (both can mean sexually aroused).
'b'+'randy'='BRANDY'
'makes' is the link.
(Other definitions for brandy that I've seen before include "eg Armagnac" , "Cognac, perhaps" , "Strong alcohol" , "Strong alcoholic spirit" , "- - -snap" .)