Related Clues:

• Modern-day 1-Across
• Word of caution
• 'Great Scott!'
• "___, why didn't I think of that?"
• Right to a horse
• Gosh
• ''Great Caesar's ghost!''
• Mild exclamation
• "Really!"
• ''Who'da thunk it!''
• ''That's amazing!''
• ''Gosh,'' years ago
• 'Fan-tastic!'
• Antiquated interjection
• "No kiddin'!"