Possible Clues:

• Address from a hat-tipper
• Palindromic address with an apostrophe
• Polite, palindromic address
• Word from a hat tipper, perhaps
• "Dear lady" alternative
• Address often heard in Netflix's ''The Crown''
• The Queen's address in both directions?
• "Sir" alternative
• Palindromic title (even with the apostrophe)
• Palindrome with an apostrophe in the middle