Wine gets Sir Nigel drunk (8)
I believe the answer is:
riesling
'wine' is the definition.
(Riesling is an example)
'sir nigel drunk' is the wordplay.
'drunk' indicates an anagram.
'sir'+'nigel'='sirnigel'
'sirnigel' is an anagram of 'RIESLING'.
'gets' is the link.
(Other definitions for riesling that I've seen before include "German/Austrian wine" , "Strange wine for Sir Ingle" , "Gin riles the wine" , "Aromatic white wine from the Rhine valley" , "Dry white wine (German)" .)