Port of New Orleans (7)
I believe the answer is:
salerno
'port' is the definition.
(I've seen this before)
'new orleans' is the wordplay.
'new' indicates an anagram.
'orleans' is an anagram of 'SALERNO'.
'of' acts as a link.
(Other definitions for salerno that I've seen before include "Orleans (anag) - Italian port" , "City of Campania" , "in Italy!" , "Battle" , "South Italian port" .)