Crossword Genius

Vote in referendum primarily about something negative? (8)

Ross

I believe the answer is:

electron

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'something negative?' is the definition.
I can't judge whether this definition defines the answer.

'vote in referendum primarily about' is the wordplay.
'vote in' becomes 'elect' (I've seen this before).
'primarily' suggests taking the first letters.
'about' becomes 'on' (as in a book 'on' a certain topic).
The initial letter of 'referendum' is 'r'.
'elect'+'r'+'on'='ELECTRON'

Can you help me to learn more?

(Other definitions for electron that I've seen before include "Negatively charged particle" , "Charged subatomic particle" , "Tiny bit of power" , "Subatomic particle involved in conduction" , "Subatomic particle -- enrol etc (anag)" .)

I've seen this clue in The Times.
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