Related Clues:

• "Gotcha!"
• ''Aha!''
• Discoverer's word
• 'Now it's clear'
• ''Yes, that's clear''
• "___ dead people"
• 'Oh, right'
• Nodder's phrase
• "Oh"
• ''Got it!''
• Exclamation after an explanation
• 'O-o-oh!'
• "Oh, okay"
• ''Uh-huh''
• Acknowledging expression