Answer: staircase

AnswerCrossword Clue
STAIRCASEFlight having risers
staircasea flight of stairs, its supporting framework, and, usually, a handrail or banisters
staircaseA set of stairs and its surrounding walls or structure
STAIRCASEIt's always up to something
STAIRCASEConnecting flight
STAIRCASEIt can put you on a different flight
STAIRCASESteps up?
STAIRCASEIt's put together step by step
STAIRCASEFlight setting
STAIRCASESteps up
STAIRCASEFlight
STAIRCASE"The Spiral ...," 1946 film
STAIRCASEConnector of stories
STAIRCASESetting for a Duchamp nude
STAIRCASEFeature of the Met.
STAIRCASE"Up the Down ...."
STAIRCASEWay up.
STAIRCASEFeature of the Kremlin palace.
STAIRCASEFlight of steps
STAIRCASEFlight pattern?
STAIRCASEYou might see one railing against it
STAIRCASEThread through many stories?
STAIRCASEConnecting flight?