Crossword Genius

One signal in Morse code (3)

Ross

I believe the answer is:

dot

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">one signal in morse code</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 dot that I've seen before include "Point; speck" , "Small round spot" , "Internet punctuation mark" , "Flyspeck: period in a web address" , "One signal used in Morse code" .)

I've seen this clue in The Irish Times.
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