Therapy (9)
'therapy' is the definition.
(I know that therapy can be written as treatment)
This is all the clue.
(Other definitions for treatment that I've seen before include "Management of something, illness say" , "prescribed drugs possibly" , "Hospital care" , "See 41 Down" , "Medical attention" .)
(Other definitions for speech that I've seen before include "Oration, address" , "Formal talk to an audience" , "words" , "Formal address or discourse" , "Formal discourse to an audience" .)