The most common and most likely answer to this crossword clue is the 5 letter word SCRAN
I've seen this crossword clue in Financial Times
S
C
R
A
N
Buddy explains!
The straight part
We know that "food" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case food = scran.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 SCRAN mean?
SCRAN noun- Food, especially that of an inferior quality; grub.
- Refuse; rubbish
- To eat