A river in China (7)
I believe the answer is:
yangtze
'a river in china' is the definition.
(I've seen this before)
This is the entire clue.
(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" .)