The most common and most likely answer to this crossword clue is the 6 letter word DAMSON
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More clues leading to the result DAMSON
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 = damson.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 DAMSON mean?
DAMSON noun- A subspecies of plum tree, Prunus domestica subsp. insititia, native to Eurasia.
- The edible fruit of this tree.
- The color of the fruit of this tree, a very deep purple.