I’m somebody with upcoming round of duties as entertainer (12)

I believe the answer is:

impersonator

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'entertainer' is the definition.
(impersonator is a kind of entertainer)

'i'm somebody with upcoming round of duties' is the wordplay.
'somebody' becomes 'person' (I've seen this in another clue).
'with upcoming round of duties' becomes 'ator' (I am not sure about this - if you are sure you should believe this answer much more).
'im'+'person'+'ator'='IMPERSONATOR'

'as' acts as a link.

Can you help me to learn more?

(Other definitions for impersonator that I've seen before include "ape" , "Impressionist" , "One's often acting" , "he takes off" , "One pretending to be another" .)

I've seen this clue in The Times.

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