Took part, with "in" (5)
I believe the answer is:
opted
(Other definitions for opted that I've seen before include "Chose from depot" , "'Decided on, chose (5)'" , "Decided as in 10 Across" , "Plumped (for)" , "Depot (anag.)" .)
I believe the answer is:
opted
(Other definitions for opted that I've seen before include "Chose from depot" , "'Decided on, chose (5)'" , "Decided as in 10 Across" , "Plumped (for)" , "Depot (anag.)" .)