Get any swimming around Zulu river? (7)
I believe the answer is:
yangtze
'river?' is the definition.
(Yangtze River is an example)
'get any swimming around zulu' is the wordplay.
'swimming' indicates anagramming the letters.
'around' indicates putting letters inside.
'zulu' becomes 'Z' (phonetic alphabet: alpha, bravo, charlie etc.).
'get'+'any'='getany'
'getany' anagrammed gives 'yangte'.
'yangte' going around 'z' is 'YANGTZE'.
(Other definitions for yangtze that I've seen before include "here (together with China Girl)?" , "Former name of China's longest river, now the Chang" , "Longest river in China" , "Longest river of Asia" , "Chinese course" .)