Idealised word of religion against being subsumed by Catholicism (8)
I believe the answer is:
romantic
'idealised word of religion' is the definition.
'romantic' can be an answer for 'idealised' (thesaurus). I am not certain of the 'word of religion' bit.
'against being subsumed by catholicism' is the wordplay.
'against' is a charade indicator (letters next to each other).
'being subsumed by' becomes 'tic' (I can't justify this - if you can you should give a lot more credence to this answer).
'catholicism' becomes 'roman' (Roman Catholicism is an example).
'tic' put after 'roman' is 'ROMANTIC'.
Can you help me to learn more?
(Other definitions for romantic that I've seen before include "Inclined to love" , "Involving a love affair, appealing to the tender emotions" , "Amorous (but not practical?)" , "Relating to love" , "Literary period in early 19th century" .)