Related Clues:

• 'Wow!'
• 'Fancy that!'
• Dazzle
• 'My word!'
• 'Golly!'
• Blow away
• 'Holy Toledo!'
• 'Well!'
• 'Heavens!'
• 'That's incredible!'
• Knock the socks off
• 'That's amazing!'
• Astound
• Knock over
• Super-duper success