Food to bake badly for a bonehead (5)
I believe the answer is:
kebab
'food' is the definition.
(kebab is a kind of food)
'bake badly for a bonehead' is the wordplay.
'badly' indicates anagramming the letters.
'for' is a charade indicator (letters next to each other).
'a bonehead' becomes 'b' (head letter of 'bone').
'bake' is an anagram of 'keba'.
'keba'+'b'='KEBAB'
'to' is the link.
(Other definitions for kebab that I've seen before include "Small pieces of meat and vegetables cooked on skewer" , "Meat dish served on skewers" , "spiked food" , "Meat preparation" , "Skewered meat dish" .)