Exercises incorporated into speech surgery (9)
I believe the answer is:
operation
'surgery' is the definition.
('operation' can be a synonym of 'surgery')
'exercises incorporated into speech' is the wordplay.
'exercises' becomes 'pe'.
'incorporated into' indicates putting letters inside.
'speech' becomes 'oration' (oration is a kind of speech).
'pe' inserted inside 'oration' is 'OPERATION'.
(Other definitions for operation that I've seen before include "Business" , "medical treatment" , "Action; process" , "Surgical or military piece of work" , "military undertaking" .)