Related Clues:

• New driver, perhaps
• McDonald's part-timer, often
• Suffix with four or six, but not five
• Liturgical bit
• Almost any girl in 'Gossip Girl'
• High-school student
• Reader of Seventeen
• Many a "One Tree Hill" character
• 3-Down sufferer, usually
• Wii user, maybe
• It follows "four" but not "five"
• Person not quite 20
• Many a driver's ed student
• Book of Hours entry
• First-year college student, usually