Related Clues:

• Cause for a groan
• Cause of a smile, maybe
• Ogden Nash bit
• Crux of some riddles
• Form of wordplay
• It may elicit groans
• Groan inducer
• 'Queen of denial,' e.g.
• Bit of wordplay
• Instance of wordplay
• Crossword clue, at times
• Ogden Nash forte
• Bit or wordplay
• Groan cause
• 'The Santa Clause,' for one