Indoctrination (12)
I believe the answer is:
brainwashing
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">indoctrination</span>' is the definition.<br/ ><span class="explanation-format__explanation">(brainwashing is a kind of indoctrination)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for brainwashing that I've seen before include "Changing mind" , "Totally indoctrinating" , "Systematic indoctrination" .)