Related Clues:

• Stamp or riot word
• '___ your age!'
• Have no doubt
• "Come to think of it . . ."
• Misbehave (with "up")
• Be positive about
• Clean Air, e.g.
• Cleanup target?
• Play one's part
• Conversation opener
• House work
• With 62-Down, be demure
• Make a decision
• Perfor-mance
• Be a 15-Across