Agitator’s Russian money, millions received by person accepting offer (12)

I believe the answer is:

troublemaker

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'agitator's' is the definition.
(I've seen this before)

I can't explain the remainder of the clue.

(Other definitions for troublemaker that I've seen before include "One inciting unrest" , "Deliberate causer of problems" , "source of agitation" , "Person stirring up problems" , "Inciter of unrest" .)

I've seen this clue in The Times.

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