Reform movement curtailed Christmas breaks (8)

I believe the answer is:

chartism

'reform movement' is the definition.
(I've seen this before)

'curtailed christmas breaks' is the wordplay.
'curtailed' means to remove the last letter.
'breaks' indicates an anagram.
'christmas' with its final letter taken off is 'christma'.
'christma' with letters rearranged gives 'CHARTISM'.

(Another definition for chartism that I've seen is " C19 parliamentary reform movement".)

I've seen this clue in The Times.

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