Related Clues:

• Bachelor's last words
• Word of assent
• Cry of delight
• 'Uh-huh'
• 'You bet!'
• Witness's reply
• 'I knew it!'
• Words of agreement
• It's positive
• Up, as a vote
• 'Why not?'
• See 53-Across
• Go-ahead
• Enthusiastic response
• 'Undoubtedly'