Loss at sea with not taking care? Not half (5)
I believe the answer is:
wreck
'loss' is the definition.
The definition and answer can be both related to natural events as well as being singular nouns.
Perhaps there's a link between them I don't understand?
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for wreck that I've seen before include "Demolish; sunken ship" , "Devastate" , "Destroy, ruin" , "A destroyed ship" , "Destroy; sunken vessel" .)