Sort of emissions vehicle cap cut by 50% (6)
I believe the answer is:
carbon
'sort of emissions vehicle' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe you can see an association between them that I don't see?
'cap cut by 50%' is the wordplay.
'cut' means to remove the last letter.
'by' is a charade indicator (letters next to each other).
'50%' becomes 'rbon' (I am not sure about this - if you are sure you should believe this answer much more).
'cap' with its final letter taken away is 'ca'.
'ca'+'rbon'='CARBON'
Can you help me to learn more?
(Other definitions for carbon that I've seen before include "Flimsy" , "Element in pollutant" , "Non-metallic element, C" , "C (with a footprint)" , "Substance" .)