Behaviour management (9)
I believe the answer is:
treatment
I believe this clue is a double definition.
'behaviour' is the first definition.
(behaviour towards or treatment of someone)
'management' is the second definition.
(treatment is a kind of management)
(Other definitions for treatment that I've seen before include "Care provided to improve a situation" , "prescribed drugs possibly" , "Handling - therapy" , "Management of something, illness say" , "See 41 Down" .)