Name hospital hiding large sum paid to church (5)
I believe the answer is:
tithe
'large sum paid to church' is the definition.
I can't judge whether this defines the answer.
'name hospital hiding' is the wordplay.
'name' becomes 'tite' (I can't justify this - if you can you should give a lot more credence to this answer).
'hospital' becomes 'H' (abbreviation for hospital on maps).
'hiding' is an insertion indicator.
'tite' placed around 'h' is 'TITHE'.
Can you help me to learn more?
(Other definitions for tithe that I've seen before include "10% tax" , "Ancient tax" , "Tax once levied" , "Tax paid to church" , "One-tenth; church tax" .)