Put this down over Christmas and while skiing last week - don't know whether anyone will remember this one - I have a full grid, some candidate words and moved letters - need a hint (a strong one) on what is required for the end game?
You need to move the 'ball' to the spare space on the bottom row.
The phrase below the grid is hinted at in the many references in the clues to music. It also mimics what you do to get the ball into its final position.