Possible Clues:

• Pertaining to oratory
• What's destroying their coral with no expectation of any comeback
• Sort of question Butler, the fount of all knowledge, it's said
• Like many stump speeches
• Is it eloquent or arch, perhaps? Don't answer that!
• Sort of question needed to charter oil transport
• Hire actor to fluff line needing no response
• Like a question that isn't a question
• (Of a question) asked only for effect
• Declamatory Charlie about to snare a party follower (not an unknown)