Replace the rear case on your iPod shuffle for a shiny new clip.
Widen the small gap between the front and rear case by inserting a metal spudger into the gap near the top of the iPod.
Insert an iPod opening tool into the newly widened gap, and pry the rear case up and away from the front case.
Insert the iPod Shuffle opening tool into the gap between the front and rear case on the same side, at the bottom corner of the iPod.
Pry the rear case away from the front case.
Lift the bottom of the rear case and remove it from the rest of the iPod.