Related Clues:

• Bagel center
• Fitting conclusion?
• ''That's incredible''
• Awed one's remark
• Plowman's command
• '___ whillikers!'
• "Color me surprised!"
• "Hmm, I didn't know that!"
• Head scratcher's remark
• "No kidding"
• "I don't know" lead-in
• Turn signal, on a horse
• "___-whiz!"
• 'No kiddin'!'
• "Who knew?"