Related Clues:

• Go "vroom, vroom"
• Speechifier
• Gun, as a engine
• Clerical VIP
• Mike user, maybe
• Clay, e.g.
• William Jennings Bryan, for one
• Gun, as your engine
• Pastor, for short
• Speaking pro
• Prepare to burn rubber
• Test, as an engine
• Make the motor roar
• Eloquent speaker
• Rally figure