Our great leader shortly to reveal this dishonest scheme (3-2,3)

I believe the answer is:

put-up job

'dishonest scheme' is the definition.
(I've seen this before)

I don't understand the rest of the clue.

(Other definitions for put-up job that I've seen before include "Prearranged underhand deceitful enterprise" , "Prearranged deception" , "Dishonest scheme" , "sham!" , "Prearranged scam" .)

I've seen this clue in The Guardian.

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