North American singer making comeback shunning Democrat celebrity (6)

I believe the answer is:

renown

I'm a little stuck... Click here to teach me more about this clue!

'celebrity' is the definition.
(I know that celebrity can be written as renown)

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for renown that I've seen before include "Fame and distinction" , "Plane's maximum width" , "Fame and public acclamation" , "High reputation, fame" , "Celebrity, fame" .)

I've seen this clue in The Independent.

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