Related Clues:

• Garlic, for one
• Sure target
• Pervasive quality
• Fungus byproduct
• Aura
• Hound's trail
• Suggestion
• Something the nose knows
• On the ___
• Bloodhound's guide
• Unpleasant aura
• Radon lacks it
• Nostril wrinkler
• A shoe may have one
• Methane's lack