Shared piece of meat (5)
I believe the answer is:
joint
I believe this is a triple definition!
'shared' is the first definition.
(associated in meaning)
'piece' is the second definition.
(joint is a kind of piece)
'of' is a link.
'meat' is the third definition.
(I know that joint is a type of cut)
(Other definitions for joint that I've seen before include "Cut of meat; mutual" , "eg Knee" , "Hip maybe" , "Combined" , "Point in the body where two bones meet" .)