Broken and useless (5)
I believe the answer is:
kaput
'broken and useless' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for kaput that I've seen before include "Broken or finished - in Germany" , "Broken down irretrievably" , "Broken, put out of use" , "Permanently broken" , "Bust" .)