Lethal (6)
(Other definitions for final that I've seen before include "binding" , "Last match in a competition" , "Last in a series of games or contests" , "Not to be altered" , "big match" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">lethal</span>' is the definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for fatal that I've seen before include "Unavoidable" , "making one late" , "Calamitous" , "Leading to disaster" , "Bringing ruin" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">lethal</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 toxic that I've seen before include "word describing bad things" , "Harmful - cox it (anag)" , "Deadly - venomous" , "Poisonous, noxious" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">lethal</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that lethal can be written as deadly)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for deadly that I've seen before include "No small bore" , "Belladonna" , "Lethal, capable of causing fatality" , "sniper aspires to be" , "There are seven such sins" .)