Dots and dashes (5,4)
I believe the answer is:
morse code
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">dots and dashes</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for morse code that I've seen before include "A way to signal" , "Signalling language" , "Means of signalling by dots and dashes" , "Way of sending message" , "Signalling system of dots and dashes" .)