Give a speech about training for work (7)
I believe the answer is:
operate
'for work' is the definition.
(synonyms)
'give a speech about training' is the wordplay.
'give a speech' becomes 'orate' (oratory is public speaking).
'about' indicates putting letters inside.
'training' becomes 'PE' (short for Physical Education).
'orate' enclosing 'pe' is 'OPERATE'.
(Other definitions for operate that I've seen before include "Work, run" , "Carry out surgery" , "Control, run, a mcahine say" , "Work, function" , "Act, like a surgeon" .)