Related Clues:

• Titian's ''Venus of Urbino,'' e.g.
• Puzzling problem
• Botticelli figure
• Naked as a jaybird
• Show-off
• Duchamp subject
• Tot minder
• Difficult problem
• Ready to skinny-dip
• ''The Thinker'', e.g.
• Painter's subject
• Michelangelo's David, e.g.
• Minor's minder
• Grandma, often
• Difficult puzzle