Shocks skinhead graffiti artists (8)
I believe the answer is:
staggers
'shocks' is the definition.
'skinhead graffiti artists' is the wordplay.
'skinhead' becomes 's' (head letter of 'skin').
'graffiti artists' becomes 'taggers'.
's'+'taggers'='STAGGERS'
(Other definitions for staggers that I've seen before include "is shocking" , "causes amazement" , "Disease affecting farmyard animals" , "Reels from side to side" , "astounds" .)