Lord gets a treatment from experienced performer (3,6)
I believe the answer is:
old stager
'experienced performer' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe you can see a link between them that I can't see?
'lord gets a treatment' is the wordplay.
'treatment' indicates an anagram (letters treated or processed differently).
'lord'+'gets'+'a'='lordgetsa'
'lordgetsa' with letters rearranged gives 'OLD STAGER'.
'from' is the link.
Can you help me to learn more?
(Other definitions for old stager that I've seen before include "veteran" , "expert" , "senior citizen" , "One who's experienced a lot" .)