African serpent (3)
(Other definitions for mamba that I've seen before include "Venomous African tree snake" , "One's venomous" , "Deadly African snake" , "Death-dealing African" , "Venomous African snake (often black)" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">african serpent</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 asp that I've seen before include "Poisonous type" , "Serpent" , "snake appears" , "creeper" , "Venomous snake" .)