Social class (5)
I believe the answer is:
caste
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">social class</span>' is the definition.<br/ ><span class="explanation-format__explanation">(caste is a kind of social class)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for caste that I've seen before include "Hereditary social class in Hindu society" , "Social group in India" , "Hereditary Hindu social division" , "Social division in India" , "Hindu social rank" .)