Related Clues:

• Norton's utility?
• Rats' hangout
• Sock type
• London subway, with 'the'
• One who'll put you in stitches?
• Some say it's for boobs
• Pipe
• Ed Norton's workplace
• Test ending?
• Pasta shape
• Underground conduit
• Betsy Ross, for one
• Part of an IV
• Hollow cylinder
• Drainage pipe