God's will supporting study into sin (10)
I believe the answer is:
providence
'god's' is the definition.
(thesaurus)
'supporting study into sin' is the wordplay.
'supporting' becomes 'pro' (being pro something is supporting it).
'study' becomes 'den' (term for a study or office).
'into' is an insertion indicator.
'sin' becomes 'vice'.
'den' put into 'vice' is 'vidence'.
'pro'+'vidence'='PROVIDENCE'
'will' acts as a link.
(Other definitions for providence that I've seen before include "US state capital" , "fortune" , "tender care" .)