Feedbag feed (4)
I believe the answer is:
oats
'feedbag feed' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for oats that I've seen before include "Porridge mix" , "Young men sow wild ones" , "Grains used as food and fodder" , "Basis of porridge" , "Wild ones are sown in youthful excess" .)