Related Clues:

• Full price payer
• Chaperone, usually
• Film category
• Unseen character in 'Peanuts,' generally
• Sci-fi or horror
• Like some diapers
• Jazz or opera, e.g.
• What "X" may mean
• Like 58-Across
• Fully grown
• Artistic category, e.g.
• Of age
• Romance or sci-fi
• Literature class
• Artistic style