Kicking back, grasp one argument about street art (8)
I believe the answer is:
graffiti
'street art' is the definition.
(I know that graffiti is a type of street art)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for graffiti that I've seen before include "Wall scribbles" , "Alfresco wall art" , "Writing on the wall" , "act of vandalism?" , "Drawing" .)