Organ introduction dropped from musical (5)

I believe the answer is:

liver

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'organ' is the definition.
(I know that Liver is a type of internal organ)

I can't explain the rest of the clue.

(Other definitions for liver that I've seen before include "Part of body" , "Glandular organ of the stomach" , "One extant" , "Viler (anag.)" , "Detoxifying organ" .)

I've seen this clue in The Telegraph.

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