Related Clues:

• Wax eloquent
• Use a soapbox
• Talk pompously
• Emulate Demosthenes
• Spout rhetoric
• Jargon ending
• Take the stump
• Captivate the crowd, maybe
• Break one's silence
• Address an audience
• Make the keynote address
• Spout
• Address the hall
• Pontificate
• Dog command