Popular music genre’s comfortable for American artist (8)

I believe the answer is:

rockwell

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'american artist' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.

'popular music genre's comfortable' is the wordplay.
'popular music' becomes 'rock' (genre of music).
'genre's comfortable' becomes 'well' (I can't explain this - if you can you should give a lot more credence to this answer).
'rock'+'well'='ROCKWELL'

'for' acts as a link.

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