German city dismissing new Australian composer (7)

I believe the answer is:

berlioz

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'composer' is the definition.
(I've seen this before)

I cannot understand how the rest of the clue works.

(Other definitions for berlioz that I've seen before include "French composer, 1803-69" , "One composer" , "French composer of "Symphonie fantastique"" , "Symphonie fantastique composer, d. 1869" , "Barman" .)

I've seen this clue in The Independent.

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