Answer:

sewers

Answer	Crossword Clue
SEWERS	"Les Miserables" setting
SEWERS	Clothing makers
SEWERS	Underground sanitation conduits

SEWERS	Waste conduits
SEWERS	They're under cities
SEWERS	Ed Norton's milieux
SEWERS	Seamstresses
SEWERS	Pipes down?
SEWERS	Needle workers
SEWERS	Needle wielders
SEWERS	Underground waste conduits

SEWERS	Tailors
SEWERS	Underground conduits
SEWERS	City conduits
SEWERS	Drainage system
SEWERS	Underground network
SEWERS	Storm drains
SEWERS	Those who might get needled at work?
SEWERS	Civic necessities.

SEWERS	Cross-stitchers.
SEWERS	Dressmakers.
SEWERS	Scene of Jean Valjean's flight.
SEWERS	Dorcas and others
SEWERS	Parts of the city underground
SEWERS	Tailors, at times
SEWERS	Norton's milieu
SEWERS	Drains

SEWERS	Valjean's escape routes
SEWERS	Places for certain turtles
SEWERS	Ninja turtles' milieux
SEWERS	Drains or seamstresses
SEWERS	Wasteful things?
SEWERS	Offbeat Parisian tourist sites
SEWERS	Settings for some escape scenes
SEWERS	Ratty conduits

SEWERS	Singer fans and users
SEWERS	Alligators' homes, in urban mythology
SEWERS	Sweatshop slaves
SEWERS	Underground conduits for water