Boudica’s tribe (5)
I believe the answer is:
iceni
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">boudica's tribe</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 iceni that I've seen before include "British people once" , "Old people" , "Boudicca's tribe" , "East Anglian tribe of Britons" , "Boudica's tribe" .)