Decide (3)
'decide' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for opt that I've seen before include "Pick from pot" , "End or act of shutting" , "Decide between possibilities, choose" , "Have preference for something" , "Plump for" .)
'decide' is the definition.
(I know that decide can be written as resolve)
This is all the clue.
(Other definitions for resolve that I've seen before include "Find the solution (to)" , "Firmness of purpose" , "Be determined" , "Settle; determination" , "Analyse" .)