Related Clues:

• Sushi ingredient
• Unpleasant emanation
• Landfill problem
• Ripe quality
• Pond scum
• It may fill up your tank
• Shark stimulus
• Skunk defense
• Seaweed, e.g.
• Pool owner's bane
• Wavy lines, in comics
• Reason for nose-pinching
• Pond greenery
• Potpourri target
• Bad aroma