Greens in US enjoying great popularity now lead (8)
I believe the answer is:
buckshot
'lead' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps you can see a link between them that I don't see?
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for buckshot that I've seen before include "sort of ammunition" , "Fired lead" , "that could kill a bird" , "Coarse lead pellets for guns" , "I may be fired" .)