Official language of Pakistan (4)
I believe the answer is:
urdu
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">official language of pakistan</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 urdu that I've seen before include "Pakistani tongue" , "Form of Hindustani" , "An official language of Pakistan related to Hindi" , "Foreign language" , "Language akin to Hindi" .)