Staircase surface (4)
I believe the answer is:
step
(Other definitions for step that I've seen before include "Footprint" , "Section of flight" , "Dance move" , "Tread - stage" , "'Stage, rung (4)'" .)
I believe the answer is:
step
(Other definitions for step that I've seen before include "Footprint" , "Section of flight" , "Dance move" , "Tread - stage" , "'Stage, rung (4)'" .)