Ruined, being loose (6)
I believe the answer is:
undone
I believe this clue is a double definition.
'ruined' is the first definition.
(I've seen this before)
'loose' is the second definition.
(thesaurus)
'being' acts as a link.
(Other definitions for undone that I've seen before include "Brought to ruin or buttons not fastened" , "Not finished; ruined" , "Annulled; untied" , "Ruined; not tied" , "Opened" .)