Proper crater devours church (6)
I believe the answer is:
decent
'proper' is the definition.
(associated in meaning)
'crater devours church' is the wordplay.
'crater' becomes 'dent' (I can't explain this - if you can you should give a lot more credence to this answer).
'devours' means one lot of letters goes inside another (I've seen this in other clues).
'church' becomes 'CE' (abbreviation for Church of England).
'dent' going around 'ce' is 'DECENT'.
Can you help me to learn more?
(Other definitions for decent that I've seen before include "Obliging or modest" , "Moral, respectable" , "Fitting; satisfactory" , "Proper; passable" , "Kind, obliging or generous" .)