Related Clues:

• “How about that?!”
• Ten C-notes
• "Fancy that!"
• "I'm impressed!"
• "Shucks!"
• "Go right, mule!"
• Exclamation in 17, 23, 50 and 61-Across
• "Oh my!"
• "No kidding!"
• Awed one's reaction
• Right call
• ''You don't say!''
• Haw's counterpart
• 'Well, whaddya know!'
• 'Really?!'