Related Clues:

• Answer to 'You wouldn't believe it'
• Product sample's invitation
• Aye
• Exclamation of affirmation
• Put to work
• See 11-Down
• 'You said it!'
• Sycophant's response
• Thumbs up
• 'Indeed!'
• Direct-mail response sticker
• Green light
• 'That's it!'
• Dunce
• Cry of success