Oust leaders for evil jokes? Expect countless troubles! (5)
I believe the answer is:
eject
'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" .)