Going against (7)
(Other definitions for defying that I've seen before include "Challenging" , "Resisting" , "Maintaining opposition" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">going against</span>' is the definition.<br/ ><span class="explanation-format__explanation">('violate' can be a synonym of 'go against')</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for violating that I've seen before include "Disregarding" , "Disturbing" .)