Persian language (5)
I believe the answer is:
farsi
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">persian language</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 farsi that I've seen before include "Iran's official language" , "Language of Iran" , "Persian language" , "Iranian language, also widely spoken in Afghanistan" , "foreign language" .)