It's in Alaska, unfortunately (4)

I believe the answer is:

alas

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'unfortunately' is the definition.
('alas' is used to express regret)

I don't understand the rest of the clue.

(Other definitions for alas that I've seen before include "Interjection of sorrow" , "Proper, respectable" , "Too bad, so sad" , "express regret thus" , "More's the pity" .)

I've seen this clue in the Evening Standard.

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