The most common and most likely answer to this crossword clue is the 5 letter word OLIVE
I've seen this crossword clue in The Times
O
L
I
V
E
More clues leading to the result OLIVE
- Old brown wire is green
- Be suppressed by old woman
- Exist to chase round girl?
- Nothing charged for fruit
- Fruit old and bad rejected
- Fruit Twist left unfinished
- Producer of oil? None, as it happens
- Tree not recorded after start of operation
- Like some yogurt to follow over fruit?
- Duck energetic when meeting second bird
Buddy explains!

The straight part
We know that "green" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case green = olive.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 OLIVE mean?
OLIVE noun- A tree, Olea europaea, cultivated since ancient times in the Mediterranean for its fruit and the oil obtained from it.
- The small oval fruit of this tree, eaten ripe (usually black) or unripe (usually green).
- The wood of the olive tree.
- A dark yellowish-green color, that of an unripe olive.
- An olivary body, part of the medulla oblongata.
- A component of a plumbing compression joint; a ring which is placed between the nut and the pipe and compressed during fastening to provide a seal.
- A small slice of meat seasoned, rolled up, and cooked.
- Any shell of the genus Oliva and allied genera; so called from the shape.
- An oystercatcher, a shore bird.
- Of a grayish green color, that of an unripe olive.
- A tree, Olea europaea, cultivated since ancient times in the Mediterranean for its fruit and the oil obtained from it.
- The small oval fruit of this tree, eaten ripe (usually black) or unripe (usually green).
- The wood of the olive tree.
- A dark yellowish-green color, that of an unripe olive.
- An olivary body, part of the medulla oblongata.
- A component of a plumbing compression joint; a ring which is placed between the nut and the pipe and compressed during fastening to provide a seal.
- A small slice of meat seasoned, rolled up, and cooked.
- Any shell of the genus Oliva and allied genera; so called from the shape.
- An oystercatcher, a shore bird.
- Of a grayish green color, that of an unripe olive.