For Victor to get Ray upset would be inconsistent (4)

I believe the answer is:

vary

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'be inconsistent' is the definition.
(I've seen this in another clue)

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 "Make a change in" , "Change according to circumstances" , "Make or become different" , "Change, modify" , "Modulate" .)

I've seen this clue in the Evening Standard.

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