Sitting Bull's tribe (5)
I believe the answer is:
sioux
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sitting bull's tribe</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for sioux that I've seen before include "Amerindian" , "N. American natives" , "Native American people" , "Native American from between Lake Michigan and the Rockies" , "Native American of Minnesota, perhaps" .)