Reservation about bad church money (9)
I believe the answer is:
resources
'money' is the definition.
(thesaurus)
'reservation about bad church' is the wordplay.
'reservation' becomes 'res' (I've seen this before).
'about' is an insertion indicator.
'bad church' becomes 'source' (I can't explain this - if you can you should believe this answer much more).
'res' placed around 'source' is 'RESOURCES'.
Can you help me to learn more?
(Other definitions for resources that I've seen before include "provides money for" , "Useful materials, assets" , "capital!" , "Personal attributes" , "Teaching materials" .)