Rescue model in part of boat hull (5)
I believe the answer is:
stave
'part of boat hull' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'rescue model in' is the wordplay.
'rescue' becomes 'save' (saving is a kind of rescuing).
'model' becomes 't' (Ford Model T car).
'in' is an insertion indicator.
'save' enclosing 't' is 'STAVE'.
Can you help me to learn more?
(Other definitions for stave that I've seen before include "Stanza of a poem" , "Part of a wooden barrel" , "Set of lines on which musical notes are written" , "Delay before off" , "System of five horizontal lines in written music" .)