Artificial international language (9)
I believe the answer is:
esperanto
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">artificial international language</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for esperanto that I've seen before include "No repeats of this artificial language, strangely" , "Ape tenors (anag.)" , "Artificial international language devised in 1887" , "common language" , "composite language" .)