Precious sort gets a note about new point produced by old Greek commander (9)
I believe the answer is:
agamemnon
'greek commander' is the definition.
The definition suggests a singular noun which matches the answer. I also know that 'greek' relates to this answer.
'precious sort gets a note about new point produced by old' is the subsidiary indication.
I cannot quite understand how this works, but
'a' is present in the answer.
'note' could be 'me' and 'me' is present in the answer.
'about' could be 'on' and 'on' is present in the answer.
'new' could be 'n' and 'n' is present in the answer.
The remaining letters 'gam' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for agamemnon that I've seen before include "mythological king" , "Legendary hero" , "Leader of Greeks in Trojan War" , "Legendary king" , "Gk. leader against Troy" .)