The most common and most likely answer to this crossword clue is the 6 letter word UNRIPE
I've seen this crossword clue in Financial Times
U
N
R
I
P
E
More clues leading to the result UNRIPE
- One from Longchamps keeps poor horse that’s not ready
- Gurnard in pies, regularly hard to digest?
- Ground in Peru is still green
- Makeup in pure green
- Pee in urine, worryingly 16 across
- Developed in Peru but not yet edible
- Not ready for difficult run? First, exercise!
- Recycled urine bottles ‘pee green‘
- Green and out of sorts in Peru
- Prune, I gathered, not ready to eat
Buddy explains!

The straight part
We know that "not yet edible" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case not yet edible = unripe.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 UNRIPE mean?
UNRIPE adjective- Not ripe.
- Developing too early; premature.