Vehicle bowled on, a contributor to emissions? (6)
I believe the answer is:
carbon
'a contributor to emissions?' is the definition.
I can't judge whether this definition defines the answer.
'vehicle bowled on' is the wordplay.
'vehicle' becomes 'car' (car is a kind of vehicle).
'bowled' becomes 'b' (cricket abbreviation).
'car'+'b'+'on'='CARBON'
Can you help me to learn more?
(Other definitions for carbon that I've seen before include "Elementary" , "Non-metallic element, C" , "Substance" , "Abundant chemical element, symbol C" , "Element of which diamonds are formed" .)