Related Clues:

• "What a discovery!"
• Mature, upwardly mobile daughter, dated brother
• Old-style 'Wow!'
• Old-style "Wow!"
• "I see where you're going with this!"
• Quaint 'Yikes!'
• 'Eureka!' alternative
• Oh god, politely
• "Eureka!" kin
• My word once accepted by renegade
• 'So that's how it's done!'
• 'Holy Moses!'
• 'Jeepers'
• "Jeepers"
• “What have we here!”