Raised railroads (3)
I believe the answer is:
els
'raised railroads' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for els that I've seen before include "Golfer; elevated railways" , "US urban railways" , "Angular distances above the horizon" , "South African golfer" , "Ernie - - (golfer)" .)