Related Clues:

• Sycophant's response
• Thumbs up
• 'Indeed!'
• Direct-mail response sticker
• Green light
• 'That's it!'
• Cry of success
• Aye-aye
• 'You betcha!'
• Sanction
• Proposal response
• 'Indubitably'
• See 58-Down
• 'Agreed!'
• 'Right on!'