Operetta somehow gets shortened (3,6,4)

I believe the answer is:

the desert song

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'operetta' is the definition.
I don't know anything about this answer so I can't tell whether this works.

'somehow gets shortened' is the wordplay.
'somehow' indicates an anagram.
'gets'+'shortened'='getsshortened'
'getsshortened' anagrammed gives 'THE DESERT SONG'.

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