Related Clues:

• Progenitor
• See 24-Across
• 'Thank you, ___!'
• Word for a superior
• Title of respect
• Elton John, e.g.
• Word of politeness
• Give rise to
• Elton John or Mick Jagger
• Knight, by definition
• 'Yes, ___!'
• Base address
• Round Table address
• 'Mister!'
• Your highness