Of a clan (6)
I believe the answer is:
tribal
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">of a clan</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 tribal that I've seen before include "Of a traditional social group" , "between extended families" , "Relating to a group of families" , "Ethnic, sectional" , "Like some groups of people" .)