Related Clues:
- One of Mark Twain's occupations
- Sort who needs to button up
- Demosthenes or Cicero
- Demosthenes, e.g
- Keynote address presenter
- Teleprompter user, maybe
- Expert talker
- Delivery specialist?
- He's happy to give people his address
- Spellbinding speaker
- Long-winded person
- Leaks shouldn't be ignored from this talkative person
- He lectures in a lab at length
- I can't shut up a container of helium
- Talkative person making joke about, say, British