Crossword Genius

Son after church to show contempt for disgusting place (7)

Ross

I believe the answer is:

cesspit

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'disgusting place' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.

'son after church to show contempt' is the wordplay.
'son' becomes 's' (genealogical abbreviation for son).
'after' means one lot of letters go next to another.
'church' becomes 'CE' (Church of England).
'to show contempt' becomes 'spit' (I've seen this before).
's' after 'ce' is 'ces'.
'ces'+'spit'='CESSPIT'

'for' acts as a link.

Can you help me to learn more?

(Other definitions for cesspit that I've seen before include "means of waste disposal" , "Sewage storer" , "Sewage receptacle" , "Place for filthy water" , "Sump" .)

I've seen this clue in The Daily Express.
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