In debut young adult novel, girl tackles zombie entering river (7)

I believe the answer is:

yangtze

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'river' is the definition.
(Yangtze is an example)

I don't understand how the remainder of the clue works.

(Other definitions for yangtze that I've seen before include "Chinese course" , "River in China; get zany (anag.)" , "Former name of China's longest river, now the Chang" , "Chinese river (Z, not S)" , "here (together with China Girl)?" .)

I've seen this clue in The Irish Times.

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