Related Clues:

• Ten C-notes
• Relative of "Zounds!"
• "Fancy that!"
• "I'm impressed!"
• "Shucks!"
• "Go right, mule!"
• Bloke's 'Well, well!'
• Exclamation in 17, 23, 50 and 61-Across
• "Oh my!"
• 'You don't say'
• 'Because ___ so!'
• "No kidding!"
• "Oh, what am I to do?"
• "___, old chap ..."
• "Good golly!"