Possible Clues:

• What suspicious folks may smell (2 words)
• Smell ___ (sense something fishy)
• “I smell ___!”
• What the dubious detect by odor
• "How now? __?": Hamlet
• 'How now! ___?': 'Hamlet'
• 'How now? __?': Hamlet
• Smell ___ (detect wrongdoing)
• I smell _ ___
• Poor as ___ (destitute)