Fine cooked meal, wicked! (8)
I believe the answer is:
fiendish
'wicked' is the definition.
(similar in meaning)
'fine cooked meal' is the wordplay.
'cooked' indicates anagramming the letters (letters cooked into a new form).
'meal' becomes 'dish' (I've seen this in other clues).
'fine' with letters rearranged gives 'fien'.
'fien'+'dish'='FIENDISH'
(Other definitions for fiendish that I've seen before include "Diabolic" , "Very difficult" , "Infernal" , "very hard" , "This Sudoku" .)