Detected (4)
I believe the answer is:
seen
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">detected</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 seen that I've seen before include "Witnessed" , "Met - understood" , "Distinguished" , "Viewed" , "Observed or percieved" .)