Caught traffic light about to change, arriving at curve in road (6)
I believe the answer is:
camber
'curve in road' is the definition.
'camber' can be an answer for 'curve' (I have seen 'Curve of road ' mean 'camber' so perhaps 'curve' could also mean 'camber'). I am not certain of the 'in road' bit.
'caught traffic light about to change' is the wordplay.
I cannot really see how this works, but
'caught' could be 'c' (cricket abbreviation) and 'c' is found in the answer.
'light' could be 'amber' (I've seen this before) and 'amber' is found within the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
'arriving at' is the link.
Can you help me to learn more?
(Other definitions for camber that I've seen before include "Curvature of aircraft wing" , "Slight upward curve in road, wing etc" , "Slope on road surface" , "may appear on road" , "Slight convexity, like the surface of a road" .)