Related Clues:

• Brief turndown to an invitation
• Encouraging word
• 'Right'
• 'Undeniably'
• Thumbs-up response
• 'Amen!'
• Agreeable reply
• Direct-mail sticker
• 'That's a go'
• “Absolutely!”
• Assent
• 'I did it!'
• Affirmative
• Indeed
• 'Sure thing!'