The most common and most likely answer to this crossword clue is the 6 letter word RAISIN
I've seen this crossword clue in The Times
R
A
I
S
I
N
More clues leading to the result RAISIN
- Endlessly cultivating dried fruit
- Grape is beset by wet weather
- Bringin' up dried fruit?
- Stepping up to pluck the last fruit
- Fruit is in water
- Fruit left in the sun, growing without end
- Fruit is getting watered, presumably?
- Painter might open the door? It’s dried
- Fruit associated with cereal almost growing
- Dried fruit is immersed in water
Buddy explains!

The straight part
We know that "Fruit left in the sun" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case fruit left in the sun = raisin.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 RAISIN mean?
RAISIN noun- A dried grape.
- Of grapes: to dry out; to become like raisins.