Northern adjective with no warm associations (6)

I believe the answer is:

arctic

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'northern' is the definition.
(thesaurus)

I can't explain the rest of the clue.

(Other definitions for arctic that I've seen before include "-- Circle; -- fox" , "Imaginary line at approximately latitude 66 degrees 32' North" , "Of regions around the North Pole" , "perishing" , "Cold region in the northern hemisphere" .)

I've seen this clue in The Irish News.

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