Death from ruin, cast out (8)
I believe the answer is:
curtains
'death' is the definition.
(I've seen this before)
'ruin cast out' is the wordplay.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'ruin'+'cast'='ruincast'
'ruincast' anagrammed gives 'CURTAINS'.
'from' is the link.
(Other definitions for curtains that I've seen before include "Hanging cloths" , "theatre equipment!" , "Window drapes in slangy ending" , "for Windows" , "It could be the end" .)