Possible Clues:

• Left to hosts the last word in singing technique
• Opening with word of prayer to glide -- in cantor's style?
• In music, a slide from one note to another
• Glide through the air
• In music, continuous glide from one note to another
• At sea, left with leader of aviation chaps to glide
• Organising Prom, notate this slide
• Left aboard with a group of chaps to add notes when gliding
• Direction in which some players are told to slide
• Left to absorb the last word in musical instruction