Related Clues:

• Footwear that's hard to run in
• It has a stem and a bowl
• Calliope array
• Be less than watertight
• Headshop purchases
• Plumber's kind of dream?
• Tell anonymously
• Plumbing outlet
• Scuba diver's worry
• Tobacco holder
• Block the pipes
• Become blocked
• Cousin of a 55-Down
• Reason to call Roto-Rooter
• Popeye prop