Possible Clues:

• The silent Marx
• Role (or, when backward, actress) in 'The Color Purple'
• ''Dr. Oz Show'' studio
• Top-hatted Marx brother
• Marx brother who never spoke
• ___ Productions, company behind TV's 'Dr. Phil'
• Silent Marx Brother
• Quiet Marx
• Sibling of Chico
• ___ Productions, Oprah Winfrey enterprise