Joint should look pink in the middle? (4)
I believe the answer is:
loin
'joint' is the definition.
(I have seen 'Joint of meat ' mean 'loin' so perhaps 'joint' could also mean 'loin')
'look pink in the middle?' is the wordplay.
'look' becomes 'lo' (archaic exclamation meaning 'look!').
'in the middle?' indicates the central letters (I've seen 'in the middle' mean this).
The central letters of 'pink' are 'in'.
'lo'+'in'='LOIN'
'should' acts as a link.
I am not very happy about this link. It may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for loin that I've seen before include "Beef cut" , "flesh!" , "Either side of the backbone between the hip bone and ribs" , "Cut of meat from between rib and haunch" , "Lumbar region" .)