The most common and most likely answer to this crossword clue is the 9 letter word ANGELICAS
I've seen this crossword clue in Independent
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More clues leading to the result ANGELICAS
Buddy explains!
The straight part
We know that "such plants" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case such plants = angelicas.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 ANGELICAS mean?
ANGELICAS noun- A tall plant, with hollow stems, genus Angelica, especially the garden angelica (Angelica archangelica).
- Candied stems of the plant, used to decorate cookies.
- Species of Aralia.
- A plucked bowl lute with two necks and most often sixteen strings, played in the manner of a harp, and popular in Baroque Europe.