Crossword Genius

A series of cases, nine closed after review (10)

Ross

I believe the answer is:

declension

'a series of cases' is the definition.
(series of grammatical cases)

'nine closed after review' is the wordplay.
'after review' indicates an anagram (letters reviewed or revised).
'nine'+'closed'='nineclosed'
'nineclosed' with letters rearranged gives 'DECLENSION'.

I've seen this clue in The Times.
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