Crossword Genius

Heads off an insurrection with some electricity, potentially (4)

Ross

I believe the answer is:

volt

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If this is the answer I cannot explain how the clue works.

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(Other definitions for volt that I've seen before include "Electrical SI unit named after a pioneering Italian physicist, d. 1827" , "SI unit of electromotive force" , "Unit of electrical potential" , "Electrical unit of measurement" , "little force" .)

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