Impersonator (5)
I believe the answer is:
mimic
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">impersonator</span>' is the definition.<br/ ><span class="explanation-format__explanation">(mimic is a kind of impersonator)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for mimic that I've seen before include "Impersonator" , "Impersonate" , "Appear just like" , "Imitate in order to ridicule" , "Imitate for humorous reasons" .)