Greek weed not the first to be cooked in dish (8)
I believe the answer is:
kedgeree
'dish' is the definition.
(kedgeree is a kind of dish)
'greek weed not the first to be cooked' is the wordplay.
'not the first' means to remove the first letter.
'to be cooked' indicates an anagram (letters cooked into a new form).
'weed' with its initial letter removed is 'eed'.
'greek'+'eed'='greekeed'
'greekeed' with letters rearranged gives 'KEDGEREE'.
'in' is the link.
(Other definitions for kedgeree that I've seen before include "Food" , "Rice, fish and egg dish" , "'Dish of rice, eggs and flaked fish (8)'" , "Rice dish with boiled eggs and flaked fish" , "Fishy breakfast dish" .)