Crossword Genius

Denounce a monarchy in speech (7)

Ross

I believe the answer is:

arraign

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'denounce' is the definition.
(thesaurus)

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(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" .)

I've seen this clue in The Hindu.
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