The most common and most likely answer to this crossword clue is the 6 letter word PAWPAW
I've seen this crossword clue in The Guardian
P
A
W
P
A
W
More clues leading to the result PAWPAW
Buddy explains!

The straight part
We know that "Fruit" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case fruit = pawpaw.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 PAWPAW mean?
PAWPAW noun- Any of several types of trees having edible fruit:
- The fruit of these trees.
- Grandfather.