Speed reader? (5)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">speed reader?</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 radar that I've seen before include "Radio location" , "System for locating distant objects" , "Range-finding and detection system" , "Pulse detection system" , "one sends out signals" .)