Longest river in China (7)
I believe the answer is:
yangtze
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">longest river in china</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 yangtze that I've seen before include "Longest river of Asia" , "Chinese river (Z, not S)" , "Longest river in China" , "Chinese river, aka Chang Jiang" , "here (together with China Girl)?" .)