The most common and most likely answer to this crossword clue is the 7 letter word CYANIDE
I've seen this crossword clue in The Daily Telegraph
C
Y
A
N
I
D
E
More clues leading to the result CYANIDE
- Dine out on candy? A potential killer!
- At first, you can die horribly from this?
- Building in decay
- Bit of idiocy, an idea that 8 might use
- Greenish-blue fish beginning to emit poison
- Alarming decay in toxic substance
- Moan, article examined reportedly for poison
- A bit of bureaucracy — an ideal cause of death?
- In secrecy, an idea to give poison
- Extremists in country support East acquiring new deadly material
Buddy explains!
The straight part
We know that "poison" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case poison = cyanide.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 CYANIDE mean?
CYANIDE noun- Any compound containing the -C≡N radical or the C≡N-1 anion.
- Potassium cyanide - a water soluble poison
- Hydrogen cyanide, or cyanide gas - a poisonous gas
- To treat or poison with cyanide.