… troubled business editor (9)
I believe the answer is:
concerned
'troubled' is the definition.
('concerned' can be similar in meaning to 'troubled')
'business editor' is the wordplay.
'business' becomes 'concern' ('concern' can be a synonym of 'business').
'editor' becomes 'ed'.
'concern'+'ed'='CONCERNED'
(Other definitions for concerned that I've seen before include "Feeling or showing worry or solicitude" , "Worried, anxious" , "anxiety" , "Involved - worried" .)