Chair who deals with the joint (6)
I believe the answer is:
carver
'chair who deals with the joint' is the definition.
The definition and answer can be both people as well as being singular nouns.
Perhaps there's an association between them I don't understand?
This is all the clue.
Can you help me to learn more?
(Other definitions for carver that I've seen before include "Dining room armchair or meat slicer" , "Sharp knife or armchair" , "Large knife or dining-room armchair" , "Armed chair or sharp knife" , "Sharp knife or kind of chair" .)