Annoys by changing presets (7)

I believe the answer is:

pesters

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

'changing presets' is the wordplay.
'changing' indicates anagramming the letters.
'presets' anagrammed gives 'PESTERS'.

'by' is the link.

(Other definitions for pesters that I've seen before include "Annoys persistently" , "Harasses" .)

I've seen this clue in The Mirror.

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