Dangerous snake (5)
(Other definitions for cobra that I've seen before include "hamadryad" , "a king, for example" , "One with hood" , "Type of snake" , "Reptile (found in Cabinet Office Briefing Room A?)" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">dangerous snake</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 adder that I've seen before include "on country walks?" , "He's making an extension" , "Type of snake" , "Venomous sort" , "venomous creature" .)
(Other definitions for mamba that I've seen before include "serpent" , "one venomous" , "One's venomous" , "Poisonous creature" , "Snake that might kill" .)