Pivot with endless upsurge in arrogance (6)

I believe the answer is:

hubris

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'arrogance' is the definition.
(hubris is a kind of arrogance)

I can't explain the remainder of the clue.

(Other definitions for hubris that I've seen before include "Overbearing pride or self-confidence" , "Excessive pride" , "Arrogant pride or presumption" , "Arrogant pride, from the Greek" , "show of arrogance" .)

I've seen this clue in the Sydney Morning Herald.

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