Destroy what’s left of ship (5)
I believe the answer is:
wreck
This clue might be a double definition.
'destroy' is the first definition.
(I know that wreck is a more specific form of the action destroy)
'left of ship' is the second definition.
'wreck' can be an answer for 'ship' (wreck is a kind of ship). I'm unsure of the 'left of' bit.
'what's' is the link.
Can you help me to learn more?
(Other definitions for wreck that I've seen before include "Utterly destroy" , "Ruin; shatter" , "A destroyed ship" , "Destroy; sunken vessel" , "Demolish; sunken ship" .)