Clue: Our great leader shortly to reveal this dishonest scheme (3-2,3)
Answer: PUT-UP-JOB
Explanation: Our great leader shortly to reveal this dishonest scheme (3-2,3)
"Our great leader" (meant, I hope, sarcastically) would be BOJO ("Boris Johnson"), so BOJO *shortly* is BOJ, and, PUT UP, that becomes JOB, so we end up with **PUT-UP JOB