Freelance (4-8)
I believe the answer is:
self-employed
'freelance' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for self-employed that I've seen before include "Working as freelance" , "Working for one's own benefit" , "Working for oneself only" , "Being one's own boss" , "Working for one's own business" .)