Joseph —, composer (5)

I believe the answer is:

haydn

(Other definitions for haydn that I've seen before include "Joseph -, prolific eighteenth to nineteenth century Austrian composer" , "Josef --, prolific composer" , "Barman" , "Joseph -, Austr. composer (Farewell Symphony)" , "The Surprise symphony composer, d. 1809" .)

I've seen this clue in The Times.

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