A curate is naughty — we appreciate the risks (9)
I believe the answer is:
actuaries
'we appreciate the risks' is the definition.
(actuaries calculate risks)
'a curate is naughty' is the wordplay.
'naughty' indicates an anagram.
'curate'+'is'='curateis'
'curateis' with letters rearranged gives 'ctuaries'.
'a'+'ctuaries'='ACTUARIES'
(Other definitions for actuaries that I've seen before include "Experts in calculations for insurance companies" , "They know about risks" , "They calculate insurance premiums" , "They calculate insurance risks" , "Financial experts" .)