Artist rips off chart (9)
I believe the answer is:
constable
'artist' is the definition.
(I've seen this before)
'rips off chart' is the wordplay.
'rips off' becomes 'cons' (conning is a kind of ripping off).
'chart' becomes 'table' (I've seen this before).
'cons'+'table'='CONSTABLE'
(Other definitions for constable that I've seen before include "Flatford Mill painter" , "Law enforcer" , "Copper - artist" , "Artist; police officer" , "See 1" .)