Caprice hasn't the heart for change (4)

I believe the answer is:

vary

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'change' is the definition.
('vary' can be a synonym of 'change')

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for vary that I've seen before include "Switch" , "Make or become different" , "Differ in size" , "Change, amend" , "Fluctuate" .)

I've seen this clue in The Telegraph.

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