Of mankind (5)
I believe the answer is:
human
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">of mankind</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for human that I've seen before include "Like a real person" , "Fallible - person" , "Man, woman or child" , "Characteristic of people" , "Anthropoid" .)