Fill in forms at elections (4)

I believe the answer is:

sate

'fill' is the definition.
('sate' can be a synonym of 'fill')

'in forms at elections' is the wordplay.
'in' indicates a hidden word.
'SATE' can be found hidden inside 'forms at elections'.

(Other definitions for sate that I've seen before include "Quench" , "Make content" , "Malaysian dish" , "Fill completely" , "Provide with more than enough" .)

I've seen this clue in The Telegraph.

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