Belgian port city (5)
I believe the answer is:
ghent
'belgian port city' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ghent that I've seen before include "source of good news" , "City of northwest Belgium, known for its cloth industry" , "NW Belgian city" , "Belgian port" , "Belgian city (from which the "good news" was brought to Aix)" .)