Shocking in-house reforms (7)
I believe the answer is:
heinous
'shocking' is the definition.
(thesaurus)
'in-house reforms' is the wordplay.
'reforms' indicates an anagram.
'in'+'house'='inhouse'
'inhouse' is an anagram of 'HEINOUS'.
(Other definitions for heinous that I've seen before include "Revolting" , "Very wicked, maybe in-house" , "Utterly wicked" , "Wicked (offence)" , "Utterly odious (crime)" .)