Some bitter alcohol turning up in wine (6)
I believe the answer is:
claret
'wine' is the definition.
(claret is a kind of wine)
'some bitter alcohol turning up' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'turning up' says the letters should be written backwards.
'teralc' is hidden in the letters of 'bitter alcohol'.
'teralc' back-to-front is 'CLARET'.
'in' is the link.
(Other definitions for claret that I've seen before include "Deep red colour" , "French wine" , "Dry red wine of Bordeaux" , "English word for red Bordeaux wine" , "Irish county almost makes a red wine" .)