The most common and most likely answer to this crossword clue is the 10 letter word CLEMENTINE
I've seen this crossword clue in The Guardian
C
L
E
M
E
N
T
I
N
E
More clues leading to the result CLEMENTINE
- Fruit, very pleasant during middle of break
- Citrus fruit pieces, set in ice, lent finesse
- Fruit makes mild alcoholic drink, but with no head
- Fruity type of girl in size nines, going by air
- Fine wine topped with fruit
- Miner’s daughter
- Girl in song, fruity type
- Attlee elected, source of embarrassment for his rival’s wife
- A fruit, kind elected foremost of eaters
- Fruit that was loved by Churchill
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 = clementine.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 CLEMENTINE mean?
CLEMENTINE noun- A type of small, sweet orange, the result of a cross between a tangerine and Seville orange.