Heavenly bread (5)
I believe the answer is:
manna
'heavenly bread' is the definition.
(as in manna from heaven)
This is all the clue.
(Other definitions for manna that I've seen before include "Heavenly food" , "Miraculous stuff dropped" , "Heavenly grub?" , "Food from heaven for Israelites with Moses in the desert" , "Godsend" .)