Trashed uniform adopted by leftie (6)
I believe the answer is:
ruined
'trashed' is the definition.
(trash can mean to ruin or damage)
I cannot understand how the rest of the clue works.
(Other definitions for ruined that I've seen before include "shot" , "Utterly destroyed" , "Broke" , "Reduced to a state of poverty" , "Irreparably damaged" .)