Roller on the road (4)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
tire
'roller on the road' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for tire that I've seen before include "Weaken" , "Wear out" , "Become fatigued" , "Become exhausted" , "Fatigue" .)