Language invented for international use (9)
I believe the answer is:
esperanto
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">language invented for international use</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 "Linguistic invention" , "Artificial international language devised in 1887" , "composite language" , "Personate in artificial language" , "Ape tenors (anag.)" .)