One teaches Jews to go on about the rise of wickedness (9)
I believe the answer is:
rabbinist
'one teaches jews' is the definition.
'to go on about the rise of wickedness' is the wordplay.
'to go on' becomes 'rabbit' (both can mean to talk excessively).
'about' indicates putting letters inside.
'the rise of' shows that the letters should be reversed in order.
'wickedness' becomes 'sin' ('sin' can be a synonym of 'wickedness').
'sin' reversed gives 'nis'.
'rabbit' going around 'nis' is 'RABBINIST'.
(Another definition for rabbinist that I've seen is " Being bound by Talmud".)