Dobbin's dinner
I believe the answer is:
oats
'dobbin's dinner' 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 "A cereal crop" , "Hardy cereals eaten by horses" , "Sow wild ones in disreputable youth" , "Wild ones are sown in youthful excess" , "Porridge mix" .)