Was bested (4)
I believe the answer is:
lost
'was bested' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for lost that I've seen before include "Mislaid or astray" , "TV show" , "Not knowing one's whereabouts" , "Unable to find one's way" , "Not having known where one is" .)