The most common and most likely answer to this crossword clue is the 12 letter word WINTERGREENS
I've seen this crossword clue in Financial Times
W
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Buddy explains!

The straight part
We know that "other plants" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case other plants = wintergreens.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 WINTERGREENS mean?
WINTERGREENS noun- Any evergreen plant.
- One of various unrelated evergreen plants, including:
- The spicy red berries of Gaultheria procumbens.
- The oil, methyl salicylate, obtained from these berries.
- The aroma of the oil, methyl salicylate, however derived.