Answer: deposer

AnswerCrossword Clue
DEPOSERKing toppler
DEPOSERCoup leader, e.g.
DEPOSEROne who testifies.
DEPOSERTrial witness, of a sort
DEPOSERUsurper
DEPOSEROne unseating
DEPOSERCoup participant
DEPOSERLawyer at a pretrial interview
deposerto testify under oath
deposerto remove from office
deposerone that deposes (to remove from office)