Ship that's gone out to save everyone (7)
I believe the answer is:
galleon
'ship' is the definition.
(type of ship)
'gone out to save everyone' is the wordplay.
'out' indicates an anagram (out can mean wrong or inaccurate).
'to save' indicates putting letters inside.
'everyone' becomes 'all' (all people).
'gone' with letters rearranged gives 'geon'.
'geon' enclosing 'all' is 'GALLEON'.
'that's' is the link.
(Other definitions for galleon that I've seen before include "All gone (anag.)" , "Large old sailing vessel" , "Spanish treasure ship" , "Large Spanish sailing ship of yore" , "One might sink" .)