Unclaimed narcotic not started by bar (9)
I believe the answer is:
ownerless
'unclaimed' is the definition.
(not claimed by an owner)
'narcotic not started by bar' is the wordplay.
'narcotic' becomes 'own' (I can't justify this - if you can you should believe this answer much more).
'not started' means to remove the first letter.
'by' becomes 'per' (I've seen this in another clue).
'bar' becomes 'less' (both can mean 'not including').
'per' with its first letter taken away is 'er'.
'own'+'er'+'less'='OWNERLESS'
Can you help me to learn more?
(Other definitions for ownerless that I've seen before include "common, perhaps" , "Not possessed by anyone" .)