Related Clues:

• 'Oh, uh-huh'
• 'But of course!'
• Wonder words
• See 22-Down
• Response to a joke
• Fortuneteller's beginning
• Quaker cereal
• Cry of epiphany
• 'Oh ...'
• Words of wonder
• 'Oh, that's what you mean'
• 'Of course'
• Comment after the fog clears
• Joke response
• Phrase of understanding