Possible Clues:

• There's nothing in a musical instrument to go to one's head
• Love to have ice-cream outside the Crown
• Small crown or ornamental headdress
• Love ice cream without topping
• Firm music-maker returning the crown
• Peer's headpiece
• The Crown takes a firm course, if backed
• Caught soundly one in a headdress
• Tiara perhaps,
• Peer under nothing in a wind instrument