Related Clues:

• Military address
• See 8-Down
• Word for a superior
• Call for
• Title of respect
• Elton John, e.g.
• Elton John or Mick Jagger
• Knight, by definition
• 'Yes, ___!'
• Base address
• Round Table address
• 'Mister!'
• Word said with a salute
• Title for 17-Across
• Hard rain?