Negative conjunction (3)
I believe the answer is:
nor
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">negative conjunction</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for nor that I've seen before include "Conjunction meaning 'and not'" , "logic circuit" , "Link word" , "Common conjunction, goes with neither" , "Word paired with "neither"" .)