Related Clues:

• Honorific for McCartney
• Ma'am's counterpart
• Mare's mate
• "To __, With Love"
• Seattle Slew, vis-à-vis Swale
• Regal term of address
• "Your Highness"
• "To ___, With Love"
• Stevie Wonder's Ellington tribute "___ Duke"
• Become a father
• "Dear ___ or Madam"
• Stable father figure?
• Monarch's address
• What to call a sergeant, perhaps
• Title for a Brit