The most common and most likely answer to this crossword clue is the 8 letter word ZUCCHINI
I've seen this crossword clue in The Guardian
Z
U
C
C
H
I
N
I
More clues leading to the result ZUCCHINI
- Vegetable with unknown feature put in dutchie regularly
- Veg from animal park, essential with joint, reportedly
- Vegetable feature found in unknown ICU configuration
- South Africanvisits Sark etc, receiving cheersfor vegetable
- Half of South African cricket club welcome trousers in green
- Focus of gazes in chic uniform, playing squash
Buddy explains!

The straight part
We know that "vegetable" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case vegetable = zucchini.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 ZUCCHINI mean?
ZUCCHINI noun- A courgette; a variety of squash, Cucurbita pepo, which bears edible fruit.
- The edible fruit of this variety of squash.