The most common and most likely answer to this crossword clue is the 10 letter word CLOUDBERRY
I've seen this crossword clue in Independent
C
L
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Y
More clues leading to the result CLOUDBERRY
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 = cloudberry.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 CLOUDBERRY mean?
CLOUDBERRY noun- A species of slow-growing bramble.
- The fruit of these plants.