Graphical device left out for craftsperson (6)
I believe the answer is:
potter
'craftsperson' is the definition.
'graphical device left out' is the wordplay.
'graphical device' becomes 'plotter' (device for plotting graphs).
'left' becomes 'l' (common abbreviation).
'out' is a deletion indicator.
'plotter' with 'l' taken away is 'POTTER'.
'for' acts as a link.
(Other definitions for potter that I've seen before include "One who makes ceramic ware" , "One who makes ceramic objects" , "Modeller using clay" , "Producer of earthenware - move with little direction or energy" , "Might Harry work with clay?" .)