Crossword Genius

In church, is it partly collapsed? (4)

Ross

I believe the answer is:

apse

I'm a little stuck... Click here to teach me more about this clue!

'in church' is the definition.
(I've seen this before)

'it partly collapsed?' is the wordplay.
'APSE' is hidden in amongst the letters.
But, I am uncertain how this is indicated.

'is' acts as a link.

Can you help me to learn more?

(Other definitions for apse that I've seen before include "Church area" , "Large recess in church" , "Projection to the east end of a church" , "Rounded end of building" , "Semicircular end of a church, behind the altar" .)

I've seen this clue in the Evening Standard.
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