Elected (5)
(Other definitions for opted that I've seen before include "Chose from depot" , "Depot (anag.)" , "Decided as in 10 Across" , "Made choice, selected" , "'Decided on, chose (5)'" .)
'elected' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for voted that I've seen before include "Took part in a ballot" , "Made choice in ballot" , "Chose" , "Went to the polls" , "Expressed preference in a ballot" .)
'elected' is the definition.
(I've seen this in another clue)
This is all the clue.