Made cadet work with engineers (7)
I believe the answer is:
created
'made' is the definition.
('create' can be a synonym of 'make')
'cadet work with engineers' is the wordplay.
'work' indicates anagramming the letters.
'with' indicates putting letters inside.
'engineers' becomes 're' (Royal Engineers).
'cadet' with letters rearranged gives 'cated'.
'cated' placed around 're' is 'CREATED'.
(Other definitions for created that I've seen before include "Made, generated" , "Brought into existence" , "Originated" , "Devised" , "Made a fuss" .)