Possible Clues:

• __ a rat (be suspicious)
• What bloodhounds and dead fish do
• Try out a bouquet
• Pong from monsieur in market
• New car attraction
• Sense deception when Frenchmen comes in
• Detect, as an aroma
• Pick up dinner, perhaps?
• What you do after a workout?
• 'Pee-yew!' elicitor