Market town in Wigtownshire, Scotland, which had a ferry service to Northern Ireland until 2011 (9)

I believe the answer is:

stranraer

(Other definitions for stranraer that I've seen before include "Scottish port for Belfast ferries" , "Scots port serving Northern Ireland" , "Scottish ferry port" , "Scottish town with ferries to N Ireland" , "Scottish ferry terminal" .)

I've seen this clue in The Mirror.

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