Related Clues:

• Thoroughbred Barton's title
• Title for Arthur Conan Doyle
• "Hey there!"
• Furtive "Hey!"
• "Yo!"
• Gent's address
• Title of honor
• "Over here," quietly
• Gielgud or Guinness
• "Hey, over here!"
• Way to get noticed
• What a person may become when kneeling
• Olivier or John, e.g.
• Ma'am's mate
• See 109-Across