Highly moral folk converted by Rasputin (8)
I believe the answer is:
puritans
'highly moral folk converted' is the definition.
I can't tell whether this definition defines the answer.
'rasputin' is the wordplay.
'rasputin' can be anagrammed to 'PURITANS'.
However, I am unsure how this is indicated.
'by' acts as a link.
Can you help me to learn more?
(Other definitions for puritans that I've seen before include "Stern religious people like Rasputin" , "Strictly religious people like Rasputin" , "Killjoys, prudes" .)