Possible Clues:

• Everybody trusts this, oddly
• Workers officially organised races, one for all on staff
• With all instruments playing together
• Boy king reversed it, employing all the players
• '___ Frutti,' 1955 hit co-written by Dorothy LaBostrie
• Grabbing first of toys, old king and I play together
• Show disapproval over note in noted passage
• All players expressed disapproval over it
• Musical direction meaning "all"
• Everybody playing to score?