The most common and most likely answer to this crossword clue is the 11 letter word CLEMENTINES
I've seen this crossword clue in The Daily Telegraph
C
L
E
M
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N
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S
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 = clementines.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 CLEMENTINES mean?
CLEMENTINES noun- A type of small, sweet orange, the result of a cross between a tangerine and Seville orange.