New pro - he wins title (9)
I believe the answer is:
ownership
'title' is the definition.
(legal term for ownership)
'new pro he wins' is the wordplay.
'new' indicates anagramming the letters.
'pro'+'he'+'wins'='prohewins'
'prohewins' with letters rearranged gives 'OWNERSHIP'.
(Other definitions for ownership that I've seen before include "Proprietorship, possession" , "Legal title" , "The right of possessing something" , "Proprietary right of possession" .)