The most common and most likely answer to this crossword clue is the 5 letter word GENIP
G
E
N
I
P
Buddy explains!
The straight part
We know that "winy fruit" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case winy fruit = genip.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 GENIP mean?
GENIP noun- A succulent berry with a thick rind, the fruit of plants in the genus Genipa.