Crossword Genius

Poisonous substance (5)

Ross

I believe the answer is:

toxin

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">poisonous substance</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>

(Other definitions for toxin that I've seen before include "Form of poison" , "Poison, venom" , "Poisonous substance" , "Poison of organic origin" , "Natural poison" .)

I've seen this clue in the Sydney Morning Herald, the Newsday and The Times.
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