Part of church in collapse (4)
I believe the answer is:
apse
'part of church' is the definition.
(part of a church building)
'collapse' is the wordplay.
'APSE' is hidden in amongst the letters.
However, I am not sure how the hidden word is indicated.
'in' is the link.
Can you help me to learn more?
(Other definitions for apse that I've seen before include "Offshoot from the choir, nave or aisle in a church" , "Semicircular recess in church" , "Projection to the east end of a church" , "Peas (anag) - found in church" , "Where you could find a magistrate's chair" .)