Related Clues:

• 'Of course!'
• 'Holy Toledo!'
• 'Gosh!'
• 'I didn't know that!'
• Cousin of 'hmmm!'
• 'Right'
• 'Interesting'
• Revelatory cry
• 'My stars!'
• Clairvoyant's start
• Words said with a nod
• Chin stroker's words
• Therapist's response
• “Understood”
• 'Heavens!'