Related Clues:

• Cousin of 'hmmm!'
• 'My stars!'
• 'Heavens!'
• 'That's incredible!'
• 'No kidding'
• 'Is that so!'
• Comment before 'I don't know'
• 'That's amazing!'
• Opposite of 1-Down
• 'I'm impressed!'
• Word before 'I don't know'
• 'Goodness!'
• ''Wow!''
• Sound of surprise
• 'Would you look at that!'