Possesses permit to make meat loaf (6)
I believe the answer is:
haslet
'meat loaf' is the definition.
(haslet is a kind of meat loaf)
'possesses permit to' is the wordplay.
'possesses' becomes 'has' ('have' can be a synonym of 'possess').
'permit to' becomes 'let' (I've seen this before).
'has'+'let'='HASLET'
'make' acts as a link.
(Other definitions for haslet that I've seen before include "Offal dish" , "Chopped pork offal" , "Meat product" , "cooked meat loaf" , "Meatloaf" .)