Maybe slide into swimming pool in building protected by Church (5)
I believe the answer is:
chute
'maybe slide' is the definition.
(I know that chute is a class)
'building protected by church' is the wordplay.
'building' becomes 'hut' (type of small building).
'protected by' is an insertion indicator.
'church' becomes 'CE' (abbreviation for Church of England).
'hut' placed within 'ce' is 'CHUTE'.
'into swimming pool in' is the link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for chute that I've seen before include "Sloping channel" , "Flume" , "Waterfall" , "Slide" , "Inclined channel for rubbish, laundry etc" .)