Related Clues:

• Stink
• Carbon monoxide's lack
• Gardener's problem
• Lead for a Lab
• Whiff
• It may be left in a locker
• Garlic, for one
• Sure target
• Pervasive quality
• Fungus byproduct
• Garden crasher
• Something the nose knows
• It may be pulled
• Unwanted growth
• Unpleasant aura