A song you all murdered — likewise! (11)

I believe the answer is:

analogously

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'likewise' is the definition.
Both the answer and definition are adverbs. Perhaps they are linked in a way I don't understand?

'a song you all murdered' is the wordplay.
'a song you all' anagrams to 'ANALOGOUSLY'.
But, I am not clear how the anagram is indicated.

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I've seen this clue in The Times.

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