Endure being the ultimate loser (4)
I believe the answer is:
last
I believe this clue is a double definition.
'endure' is the first definition.
(I know this)
'the ultimate loser' is the second definition.
(last place)
'being' acts as a link.
(Other definitions for last that I've seen before include "` `The cobler should stick to his ....' '" , "part of Oxford's restoration with this?" , "model for a leprechaun" , "Piece of cobbler's equipment" , "stay at the back" .)