Port wine? (6)
I believe the answer is:
malaga
I believe this clue is a double definition.
'port' is the first definition.
(I know that Malaga is a port)
'wine?' is the second definition.
(I've seen this before)
(Other definitions for malaga that I've seen before include "Resort in Andalusia" , "Spanish port and resort town" , "Army rank; not shared" , "Southern Spanish city and resort" , "Spanish city port" .)