Zany, get splashing in river (7)

I believe the answer is:

yangtze

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

'zany get splashing' is the wordplay.
'zany get' can be anagrammed to 'YANGTZE'.
But, I'm unsure how this is indicated.

'in' acts as a link.

Can you help me to learn more?

(Other definitions for yangtze that I've seen before include "Chinese river; get zany (anag.)" , "Chinese course" , "Longest river in China" , "big river" , "Former name of China's longest river, now the Chang" .)

I've seen this clue in The Guardian.

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