Possible Clues:

• Old Roman spies given new name under cover
• Conspirator and wrongdoer reported
• Evildoer, say, a conspirator
• Roman poet sounds like a transgressor
• Roughly about hotel conspirator
• Conspirator against Caesar sounds like a wicked fellah
• Panic in national assembly harbouring conspirator
• Poet, conspirator and wicked type, some say
• Roman poet a transgressor, we hear
• Plotter in 'Julius Caesar'