Discrepancies in a caver's review (9)

I believe the answer is:

variances

'discrepancies' is the definition.
('variance' can be a synonym of 'discrepancy')

'in a caver's review' is the wordplay.
'review' indicates anagramming the letters.
'in'+'a'+'cavers'='inacavers'
'inacavers' with letters rearranged gives 'VARIANCES'.

I've seen this clue in The Daily Express.

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