Related Clues:

• Major Hoople's outburst, in old comics
• Knock the socks off
• 'That's amazing!'
• 'Look here, old chap!'
• Opposite of 1-Down
• Breach
• Antiquated outburst
• Mary Higgins Clark's 'Before ___ Good-Bye'
• Quaint outburst
• Astound
• 'Well, well!'
• Knock over
• 'Pardon me ...'
• Super-duper success
• Cry of shock