Seaside resort in Highland, Scotland, northeast of Cawdor Castle (5)
I believe the answer is:
nairn
(Other definitions for nairn that I've seen before include "Ran in to the Scottish town" , "Scot. Highland town, old county" , "Ran in (anag) - a place in Scotland" , "Highlander's home" , "Scottish Highland resort and port" .)