Japanese warrior caste (7)
I believe the answer is:
samurai
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">japanese warrior caste</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 samurai that I've seen before include "Japanese militarist" , "Japanese fighter" , "Member of the military caste in feudal Japan" , "Japanese military retainer" , "Sudoku variant" .)