Take over an endless wild pursuit (5)

I believe the answer is:

usurp

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'take over' is the definition.
(I know that take over can be written as usurp)

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for usurp that I've seen before include "Expropriate" , "Take possession of, illegally" , "Depose illegally" , "Commandeer" , "Seize power without authority" .)

I've seen this clue in the Evening Standard.

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