In academies, say, education's attempted (7)
I believe the answer is:
essayed
'attempted' is the definition.
('essay' can be a synonym of 'attempt')
'in academies say education's' is the wordplay.
'in' indicates a hidden word.
'ESSAYED' is hidden in the letters of 'academies say educations'.
(Other definitions for essayed that I've seen before include "tested" , "Had a go" , "Attempted, strove" , "Tried (E, not A)" , "Made formal attempt" .)