The most common and most likely answer to this crossword clue is the 9 letter word TOADSTOOL
I've seen this crossword clue in The Guardian
T
O
A
D
S
T
O
O
L
More clues leading to the result TOADSTOOL
- Car-mad character’s device that may be lethal
- Despicable individuals raised money to grow poisonous plant
- . Lowlifes wanting money back? It makes you sick
- One spotted in woods: amphibians also reaching lake
- What could be poisonous, hateful folk wanting money back
- It’s probably not good to eat nasty people with a utensil
- Loathsome person’s penis – don’t eat it!
- A wild fungus? A lot stood out
- To get mushroom risotto, load is blended
- Type of fun guy reportedly got putting hand under jumpers as well
Buddy explains!
The straight part
We know that "poisonous plant" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case poisonous plant = toadstool.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 TOADSTOOL mean?
TOADSTOOL noun- Any inedible or poisonous mushroom, especially an agaric.