The most common and most likely answer to this crossword clue is the 6 plus 1 letter word PEACH} :
I've seen this crossword clue in The Daily Telegraph
P
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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 = peach} :.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 PEACH} : mean?
PEACH} : noun- A tree (Prunus persica), native to China and now widely cultivated throughout temperate regions, having pink flowers and edible fruit.
- The soft juicy stone fruit of the peach tree, having yellow flesh, downy, red-tinted yellow skin, and a deeply sculptured pit or stone containing a single seed.
- A light moderate to strong yellowish pink to light orange color.
- A particularly admirable or pleasing person or thing.
- Of or pertaining to the color peach.
- Particularly pleasing or agreeable.
- To inform on someone; turn informer.
- To inform against.
- A particular rock found in tin mines, sometimes associated with chlorite.