New Zealand city (8)
I believe the answer is:
auckland
'new zealand city' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for auckland that I've seen before include "Seaport on North Island in New Zealand" , "Principal port of New Zealand" , "Largest city on New Zealand's North Island" , "NZ city" , "Province and largest city of New Zealand" .)