City north of Lisbon
I believe the answer is:
oporto
'city north of lisbon' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for oporto that I've seen before include "Iberian location" , "Second largest city in Portugal" , "Portuguese wine trade centre" , "City near the mouth of the River Douro" , "European city" .)