Evil church from that time onwards (5)
I believe the answer is:
since
'from that time onwards' is the definition.
'since' can be an answer for 'from' (I've seen this in another clue). I'm unsure of the remainder of the definition.
'evil church' is the wordplay.
'evil' becomes 'sin' (synonyms).
'church' becomes 'CE' (abbreviation for Church of England).
'sin'+'ce'='SINCE'
Can you help me to learn more?
(Other definitions for since that I've seen before include "in the past" , "Because; ago" , "From that time one" , "Seeing that" .)