Charge a public official with an offence (7)
I believe the answer is:
impeach
'charge a public official with an offence' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for impeach that I've seen before include "Charge with treason, etc" , "Bring an accusation against" , "Charge with major crime" , "Criticise" , "Charge with a crime (against the state)" .)