Toxin (5)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">toxin</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for poison that I've seen before include "Eg, toxin" , "[ADDER] 's defence" , "Bane" , "Damaging stuff - drink?" , "Deadly substance" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">toxin</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that toxin can be written as Venom)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for venom that I've seen before include "Poison; malice" , "essential part of The Sting" , "ill will" , "Toxic substance" , "Snake's poison" .)