Choose — chosen (5)
I believe the answer is:
elect
This clue is a double definition.
'choose' is the first definition.
(I know that elect is a more specific form of the action choose)
'chosen' is the second definition.
('elect' as an adjective can mean chosen)
(Other definitions for elect that I've seen before include "Choose; singled out" , "Vote to put into power" , "Choose by ballot" , "special people" , "Select; chosen" .)