Admonished education reform (9)
I believe the answer is:
cautioned
'admonished' is the definition.
('caution' can be a synonym of 'admonish')
'education reform' is the wordplay.
'reform' indicates an anagram.
'education' is an anagram of 'CAUTIONED'.
(Other definitions for cautioned that I've seen before include "Warned by way of education" , "Given formal warning" , "Gave warning" , "Education (anag)" .)