Malfunction (6)
I believe the answer is:
glitch
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">malfunction</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 glitch that I've seen before include "Sudden brief malfunction in electronic system" , "Minor mishap" , "Brief failure" , "'Bug, fault in a system (6)'" , "Technological problem" .)