Sloping walkways (5)
I believe the answer is:
ramps
'sloping walkways' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ramps that I've seen before include "Gradients" , "Small road ridges for prams" , "Slopes to calm traffic" , "Slopings passages" , "Sloping passages" .)