Improve care for mental cases (6)

I believe the answer is:

reform

'improve' is the definition.
(reforming is a kind of improving)

'care for mental cases' is the wordplay.
'cases' indicates a hidden word.
'REFORM' can be found hidden inside 'care for mental'.

(Other definitions for reform that I've seen before include "Go straight" , "Abandon evil practices" , "Correct(ion of) abuses" , "Mend one's ways" , "Removal of abuses" .)

I've seen this clue in The Independent.

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