Related Clues:

• Garden annoyance
• Grass
• It may be fishy
• Unwanted lawn growth
• Marijuana
• Thistle, e.g.
• Something carbon monoxide lacks
• Musk quality
• Nasal offense
• Breath mint target
• Gas-leak evidence
• Skunk output
• Effluvium
• Foul emanation
• It's in the dumps