Granola ingredients (4)
I believe the answer is:
oats
'granola ingredients' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for oats that I've seen before include "Edible grass seeds" , "Sow wild ones in disreputable youth" , "Grains used as food and fodder" , "A cereal crop" , "Grain for porridge" .)