Hot breakfast cereal (6)
I believe the answer is:
farina
'hot breakfast cereal' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for farina that I've seen before include "Flour of cereal, nuts or starchy roots" , "Flour made from cereal grain" , "Flour or meal" , "Mealy powder" .)