Starts upsetting the peons (5)

I believe the answer is:

opens

'starts' is the definition.
(opening is a kind of starting)

'upsetting the peons' is the wordplay.
'upsetting' indicates an anagram.
'peons' is an anagram of 'OPENS'.

(Other definitions for opens that I've seen before include "Unseals" , "competitions welcoming all-comers" , "releases" , "Unlocks" , "Exposes, begins" .)

I've seen this clue in the Evening Standard.

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