Related Clues:

• 'Who's on first?' asker
• Bud of comedy
• The Airfarce's Roger _____
• Big name in '40s films
• "Who's on first" comic
• ''Who's on first?'' asker
• ''Who's on First?'' comedian
• "Who's on first?" asker
• Rocker Elvis
• "Who's on First?" straight man
• He asked "Who's on first?"
• "Who's on first?" comedian
• "Buck Privates" co-star
• Elvis, for one
• Double act partner of Lou Costello