Harmonica (5,5)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">harmonica</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for mouth organ that I've seen before include "What produces musical sounds" , "Harmonica" , "I can make music" , "tongue?" .)