The most common and most likely answer to this crossword clue is the 4 letter word TOFU
I've seen this crossword clue in The Times
T
O
F
U
More clues leading to the result TOFU
- Some hint of umami in Asian dish...
- Model, perhaps 17, chucked up soybean curd
- Some remnant of unappetising food
- Substitute meat in cost of upkeep
- Wasted half of town fund to get Asian food
- Time flying saucer returned bland foodstuff?
- Having taken two starters each, too full for food
- Component of feast of unusual food
- Time and space traveller brought back non-meat protein
- Eastern dish starting to track mysterious craft from the south
Buddy explains!

The straight part
We know that "Veggie food" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case veggie food = tofu.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 TOFU mean?
TOFU noun- A protein-rich food made from curdled soy milk.
- A box or rectangle, empty or with a question mark or hexadecimal code inside, displayed by some systems in place of a character not supported by available fonts. (such as □ or ժ)