Supporters one charged after a scrape (8)
I believe the answer is:
abrasion
'scrape' is the definition.
(synonyms)
'supporters one charged after a' is the wordplay.
'supporters' becomes 'bras' (I've seen this in other clues).
'one charged' becomes 'ion' (type of charged particle).
'after' means one lot of letters go next to another.
'bras'+'ion'='brasion'
'brasion' after 'a' is 'ABRASION'.
(Other definitions for abrasion that I've seen before include "I ban oars over skin scrape" , "scraping away" , "Cut or scratch" , "Skin wound" , "Grazing" .)