Transport system (5,3)
'transport system' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for railway that I've seen before include "Train system" , "Line of track" , "Track for locomotives" , "eg Funicular" , "Track for trains" .)
(Other definitions for cable car that I've seen before include "Skier's transport" , "that takes one to Snowdon-like heights?" , "Clear cab for carriage used by ascending skiers" , "Suspended transport system" , "Funicular vehicle" .)