There are many threads that ask about how to listen to the Sansa Clip while it is charging. Most indicate for you to cover the pins, remove them or place something in the way. I have found a way for people to listen to their music while charging their Sansa Clips.
The answer is really simple. When you put the USB portion into the clip, do it slowly and watch to Sansa Screen. As soon as the Battery Symbol starts to charge, stop. This lets you charge your Clip without entering USB mode and allows you to listen to music. This works as my Sansa Clip is charging and I am currently listening to music off it as I am typing this out. As a note, the USB that is connected to the Clip will have some of the metal casing shown instead of firmly touching the Clip.
Hope this helps everyone out.