They explain poor sex: it’s shattering (10)

I believe the answer is:

expositors

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'they explain' is the definition.
I know nothing about this answer so I can't judge whether this works.

'poor sex it's shattering' is the wordplay.
'shattering' indicates anagramming the letters.
'poor'+'sex'+'its'='poorsexits'
'poorsexits' with letters rearranged gives 'EXPOSITORS'.

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I've seen this clue in The Times.

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