Related Clues:

• Drain
• Tailor
• See 33-Across
• Underground network
• Drainage system
• Urban alligator's home, they say
• Ratty place
• Rats' hangout
• One who'll put you in stitches?
• Ed Norton's workplace
• Underground conduit
• Betsy Ross, for one
• Drainage pipe
• Home to some crocs
• Setting for a famous 'Les Misérables' scene