Doesn't change, this port (6)

I believe the answer is:

ostend

'this port' is the definition.
(I know that Ostend is a port settlement)

'doesn't change' is the wordplay.
'change' is an anagram indicator.
'doesnt' with letters rearranged gives 'OSTEND'.

(Other definitions for ostend that I've seen before include "Belgian port and resort" , "European port" , "Port - doesn't (anag)" , "cross-channel port" , "Channel port" .)

I've seen this clue in the Evening Standard.

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