Related Clues:

• Astonished query
• ''__ hoppen?'' (dazed one's query)
• Question asked by one with a stuffy nose?
• '___ hoppen?'
• Dumbfounded exclamation
• Jock's query with hard answer
• '___ happen?'
• "___ happen?"
• Inquiry made while half awake, maybe
• "Hunh?"
• Groggy person's inquiry
• Question asked with an open mouth
• '70s org. for 21-Down
• Cafe ___? (iconic Greenwich Village club)
• 'Hunh!?'