African viper (4,5)
I believe the answer is:
puff adder
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">african viper</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 puff adder that I've seen before include "Snake" , "Poisonous type" , "poisonous creeper" , "African viper" , "Venomous viper" .)