Heavenly food (5)
I believe the answer is:
manna
'heavenly food' is the definition.
(as in manna from heaven)
This is all the clue.
(Other definitions for manna that I've seen before include "Old Testament food (from heaven?)" , "Sweet gum; an unexpected benefit" , "wonderful food" , "Spiritual nourishment" , "Heavenly grub?" .)