Discarded as useless (8)
I believe the answer is:
scrapped
'discarded as useless' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for scrapped that I've seen before include "Disposed of, article or idea, say" , "did battle" , "Abolished, cancelled" , "Was fighting" , "Discarded as useless" .)