Ridicule about religious instruction upset curate (10)
I believe the answer is:
caricature
'ridicule' is the definition.
(thesaurus)
'about religious instruction upset curate' is the wordplay.
'about' becomes 'ca' (short for circa).
'religious instruction' becomes 'RI' (abbreviation).
'upset' is an anagram indicator.
'curate' is an anagram of 'cature'.
'ca'+'ri'+'cature'='CARICATURE'
(Other definitions for caricature that I've seen before include "This is distorted" , "Spitting Image" , "Exaggerated depiction (of someone)" , "Comical representation" , "Exaggerated portrait" .)