Indict leaders removed from slack school (7)
I believe the answer is:
impeach
'indict' is the definition.
(thesaurus)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for impeach that I've seen before include "Disparage" , "Charge public official with misconduct - Clinton?" , "Charge with major crime" , "Arraign - revile" , "Level a charge against -- pace him (anag)" .)