Free from sin, is inclined to enter church (7)
I believe the answer is:
cleanse
'free from sin' is the definition.
'is inclined to enter church' is the wordplay.
'is inclined' becomes 'leans' ('lean' can be a synonym of 'be inclined'**).
'to enter' indicates putting letters inside.
'church' becomes 'ce' (abbreviation for Church of England).
'leans' put into 'ce' is 'CLEANSE'.
(Other definitions for cleanse that I've seen before include "Thoroughly remove dirt from" , "Make spotless" , "Free of sin" , "Wash" , "give absolution" .)