Save from ruin (7)
I believe the answer is:
salvage
'save from ruin' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for salvage that I've seen before include "Rescue (lost cargo)" , "Rescue of a damaged ship or its cargo" , "Rescue of property from peril" , "Rescue (of) ship, etc" , "Rescue of a ship's cargo" .)