Sort wine for relatives (7)
I believe the answer is:
kindred
'relatives' is the definition.
(I've seen this in another clue)
'sort wine' is the wordplay.
'sort' becomes 'kind' (synonyms).
'wine' becomes 'red wine' (red is a type of wine).
'kind'+'red'='KINDRED'
'for' acts as a link.
(Other definitions for kindred that I've seen before include "Family and relations" , "Related by blood - having similar qualities" , "Relatively" , "Related by blood or marriage" , "Related (people)" .)