Call in question (7)
I believe the answer is:
impeach
'call in question' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for impeach that I've seen before include "call into question" , "Criticise" , "Charge with treason, etc" , "Accuse of serious crime against the state, say treason" , "Bring a charge against" .)