Two-wheeled transport (7)
I believe the answer is:
bicycle
'two-wheeled transport' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for bicycle that I've seen before include "Two-wheeled vehicle" , "One's pushed to make progress" , "Personal transport" , "Tour de France racer?" , "A tandem is a . . . . . . . nade for two" .)