Wherein the driver can give citizens advice? (3)
I believe the answer is:
cab
'advice?' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for cab that I've seen before include "'The authority collects money made from crime, initially (3)'" , "An American taxi" , "Taxi to hold an engine-driver" , "Hired car" , "A taxi in America" .)