Related Clues:

• 'Oh, right!'
• See 20-Across
• 'Aha!'
• Up, as a vote
• 'Why not?'
• '___, right'
• Go-ahead
• Enthusiastic response
• 'Ah!'
• Expression of understanding
• 'Undoubtedly'
• 'Clear as day'
• Aye
• Exclamation of affirmation
• 'Gotcha'