The most common and most likely answer to this crossword clue is the 9 letter word MYROBALAN
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More clues leading to the result MYROBALAN
Buddy explains!

The straight part
We know that "cherry plum/c/herry plum" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case cherry plum/c/herry plum = myrobalan.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 MYROBALAN mean?
MYROBALAN noun- A plum-like fruit from various trees of the genus Terminalia, formerly used in medicine and now in the dyeing industry; also, the tree itself.