Denounce a monarchy in speech (7)
I believe the answer is:
arraign
'denounce' is the definition.
(thesaurus)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for arraign that I've seen before include "put on a charge" , "Bring to trial" , "Call before court to answer criminal charge" , "Act against" , "Accuse of a wrong" .)