Facetious lady impersonates saint after church (7)

I believe the answer is:

chapess

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'facetious lady' is the definition.
The definition suggests a singular noun which matches the answer.

'impersonates saint after church' is the wordplay.
'impersonates' becomes 'apes' (I've seen this in another clue).
'saint' becomes 's'.
'after' says to put letters next to each other.
'church' becomes 'ch' (abbreviation on maps etc).
'apes'+'s'='apess'
'apess' after 'ch' is 'CHAPESS'.

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(Other definitions for chapess that I've seen before include "Woman jokily" , "Girl" .)

I've seen this clue in The Times.

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