Compatible study on urgent reforming (9)
I believe the answer is:
congruent
'compatible' is the definition.
(thesaurus)
'study on urgent reforming' is the wordplay.
'study' becomes 'con' (I've seen this before**).
'on' indicates putting letters inside.
'reforming' indicates an anagram.
'urgent' is an anagram of 'gruent'.
'con' inserted within 'gruent' is 'CONGRUENT'.
(Other definitions for congruent that I've seen before include "perfectly fit" , "In harmony with" , "Corresponding with" , "In agreement" .)