Crossword Genius

Church's bouncy castle isn't for grown-ups to enter (5,8)

Ross

I believe the answer is:

saint clements

'church's' is the definition.
(Church of Saint Clement's, London church)

'bouncy castle isn't for grown-ups to enter' is the wordplay.
I cannot really see how this works, but
'isn't' could be 'aint' (non-standard version of 'isn't') and 'aint' is present in the answer.
This explanation may well be incorrect...

I've seen this clue in The Guardian.
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