Possible Clues:

• Jacques --, French composer
• Jacques -, French composer; tribe (anag.)
• Jacques --, French composer of the humorous orchestral 'Divertissement'
• Composer who won the French Prix de Rome in 1919
• Composer with strange characters from tribe
• Jacques --, French composer whose works include the orchestral 'Divertissement'
• French composer, current friend of Mary Poppins
• Austrian musician, not good, eclipsed by Italian composer
• Unexpectedly met dramas in Bookered book