Renounce sin in Religious Education class (6)
I believe the answer is:
reform
'renounce sin' is the definition.
I can't tell whether this defines the answer.
'religious education class' is the wordplay.
'religious education' becomes 'RE' (abbreviation).
'class' becomes 'form' (form class is a kind of class).
're'+'form'='REFORM'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for reform that I've seen before include "Change one's ways (for the better?)" , "Abandon evil practices" , "Removal of abuses" , "Correct(ion of) abuses" , "Show improvement" .)