Intentionally disregard (6)
I believe the answer is:
ignore
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">intentionally disregard</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 ignore that I've seen before include "Fail to notice (6)" , "Fail to consider" , "Cut head off" , "Deliberately disregard" , "set aside" .)