Has an inclination to enter church free from sin (7)
I believe the answer is:
cleanse
'free from sin' is the definition.
'has an inclination to enter church' is the wordplay.
'has an inclination' becomes 'leans' (I am not sure about this - if you are sure you should believe this answer much more).
'to enter' means one lot of letters goes inside another.
'church' becomes 'ce' (abbreviation for Church of England).
'leans' inserted within 'ce' is 'CLEANSE'.
Can you help me to learn more?
(Other definitions for cleanse that I've seen before include "Disinfect" , "carry out purification" , "clear of muck" , "subject to purification" , "Scrub" .)