Conform (3,3,4)
I believe the answer is:
toe the line
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">conform</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for toe the line that I've seen before include "Conform to expectations" , "Follow orders" , "Conform to expected requirements" , "Comply with authority" , "Obey authority" .)