Some Alaskan music? No, Jamaican (3)

I believe the answer is:

ska

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'no jamaican' is the definition.
I know nothing about this answer so I can't judge whether this works.

'some alaskan music?' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'SKA' is hidden within 'alaskan music'.

Can you help me to learn more?

(Other definitions for ska that I've seen before include "Noted genre" , "Dancehall music" , "Jamaican music, forerunner of reggae" , "Music genre" , "Jamaican music style" .)

I've seen this clue in The Times.

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