Before noon wild boar is heavenly food (8)
I believe the answer is:
ambrosia
'heavenly food' is the definition.
(ambrosia is the food of the greek gods)
'before noon wild boar is' is the wordplay.
'before noon' becomes 'am' (as in AM on a clock).
'wild' indicates anagramming the letters.
'boar'+'is'='boaris'
'boaris' is an anagram of 'brosia'.
'am'+'brosia'='AMBROSIA'
(Other definitions for ambrosia that I've seen before include "good food" , "Legendary food bringing immortality" , "Nectar of the gods" , "dish fit for the gods when cooked without salt" , "food from the deli?" .)