Conform to
I believe the answer is:
obey
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">conform to</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 obey that I've seen before include "Be dominated" , "Do as one's told" , "Abide by" , "Accept instructions" , "Do as you're told!" .)