Related Clues:
- Thread puller
- They're under cities
- Norton's workplace
- Part of an underground network
- Ratty conduits
- City conduits
- Needle workers
- It's accessed via a manhole
- Ninja Turtles' home
- Homes to urban gators
- Storm drain
- Alligator's home, in urban myths
- Home of some alligators
- Stinky locale to work
- 'Les Misérables' locale