Possible Clues:

• Redhead
• Common nickname for a redhead
• Redhead, slangily
• Prop comedian known for his bright red hair
• Incentive better for Lucille Ball, perhaps?
• Lock-related nickname
• Redhead swimmer nets redhead German boy
• Lucille Ball was one, slangily
• Scott Thompson's nom de comedy
• Nicole Kidman or Lucille Ball