Possession is to have a craft, we hear (9)
I believe the answer is:
ownership
'possession' is the definition.
(I know that possession can be written as ownership)
'have a craft we hear' is the wordplay.
I cannot really understand how this works, but
'have' could be 'own' (to have something is to own it) and 'own' is located in the answer.
'craft' could be 'ship' (ship is a kind of craft) and 'ship' is located in the answer.
The remaining letters 'er' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'is to' is the link.
Can you help me to learn more?
(Other definitions for ownership that I've seen before include "Legal title" , "Proprietorship, possession" , "The right of possessing something" , "Proprietary right of possession" .)