Truly soulless business operating for baron (6)
I believe the answer is:
tycoon
'baron' is the definition.
(I know that baron can be written as tycoon)
'truly soulless business operating' is the wordplay.
'truly soulless' becomes 'ty' (I am not sure about this - if you are sure you should believe this answer much more).
'business' becomes 'co' (short for company).
'operating' becomes 'on' (I've seen this in other clues).
'ty'+'co'+'on'='TYCOON'
'for' acts as a link.
Can you help me to learn more?
(Other definitions for tycoon that I've seen before include "Rich and powerful businessman" , "See 2" , "Capitalist" , "Business magnate or mogul" , "Rich powerful person" .)