Read a bar code (4)
I believe the answer is:
scan
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">read a bar code</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 scan that I've seen before include "Hercule ---, detective" , "Look over (in order to copy?)" , "show in this?" , "Convert (a document) to a digital form" , "Examine quickly" .)