The most common and most likely answer to this crossword clue is the 6 letter word CEREAL
C
E
R
E
A
L
More clues leading to the result CEREAL
- Extremely coarse, proper grass
- Before entering California, you'll get some breakfast
- Something for breakfast? It’s nice, really — in part
- Popular breakfast show in instalments on the radio
- Treacle not originally produced as breakfast food
- Heard of television offering breakfast?
- Paddy, for example, like McCoy after Church?
- Intellectual, clever liberal not against eating endless fibre
- Deviant relaces, not beginning to sow one’s oats
- Breakfast programme broadcast
Buddy explains!

The straight part
We know that "breakfast food" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case breakfast food = cereal.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does CEREAL mean?
CEREAL noun- A type of grass (such as wheat, rice or oats) cultivated for its edible grains.
- The grains of such a grass.
- Breakfast cereal.