Related Clues:

• 'Impressive!'
• Expression of delight
• Knock 'em dead
• Response to daredeviltry
• Circus sound
• ''I'm impressed!''
• [Gasp!]
• La la lead-in
• Cry at a circus
• 'That's really something!'
• Sound of contentment
• 'What a surprise!'
• 'How exciting!'
• 'Cool, man!'
• ''Far out!''