Related Clues:

• "Wow!"
• "Goodness!"
• Man of the future
• "Golly!"
• 'Man!'
• “How about that?!”
• Knock ('em) dead
• Really impress
• Impress
• Ten C-notes
• "Fancy that!"
• "I'm impressed!"
• "Shucks!"
• "Go right, mule!"
• Exclamation in 17, 23, 50 and 61-Across