Patriotic song at each show’s going wild (5,3,3)

I believe the answer is:

scots wha hae

'patriotic song' is the definition.
(song about Scotland)

'at each show's going wild' is the wordplay.
'going wild' is an anagram indicator.
'at'+'each'+'shows'='ateachshows'
'ateachshows' anagrammed gives 'SCOTS WHA HAE'.

I've seen this clue in The Independent.

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