A river in China (7)
I believe the answer is:
yangtze
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">a 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 "big river" , "Asia's longest river" , "China's longest river now known as Chang Jiang" , "China's main river" , "Chinese river, aka Chang Jiang" .)