Crossword Genius

Oust leaders for evil jokes? Expect countless troubles! (5)

Ross

I believe the answer is:

eject

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

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

Can you help me to learn more?

(Other definitions for eject that I've seen before include "Release a cassette from a video recorder, for instance" , "Expel, throw out" , "Spit out" , "Remove forcibly" , "exile" .)

I've seen this clue in The Independent.
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