Possible Clues:

• Musician arrived with Fury
• Orchestrator
• Rare gran (anag.)
• Like Gil Evans maybe?
• One who manages to live an outdoor life, by the sound of it
• One who sees to it that island, for example, backs king
• One who adapts music
• Maybe a Forest defender's heard, one providing the score
• One doing ordaining arrives with incense
• The role of Sammy Nestico for Count Basie’s band, and Nelson Riddle for Frank Sinatra