Possible Clues:

• One of Frank's wives
• Filmmaker DuVernay
• 'A Wrinkle in Time' director DuVernay
• Gardner of the silver screen
• Glam Gardner
• Clark's "Mogambo" co-star
• Hollywood's Gardner
• Gardner of 'The Barefoot Contessa'
• Frank's second wife
• Gardner of 'Show Boat'