Moderate 1100 on report (5)

I believe the answer is:

emcee

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'moderate' is the definition.
The answer and definition can be both people as well as being singular nouns.
Maybe you can see an association between them that I don't see?

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

Can you help me to learn more?

(Other definitions for emcee that I've seen before include "Compre" , "One presents" , "Presenter" , "Formal host" , "Master of ceremonies (mainly US)" .)

I've seen this clue in the Sydney Morning Herald.

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