I don’t know if it’s possible with the current firmware.
Here’s a thread from a couple years back, discussing how the letter used in the firmware file that you apply changes the firmware options and operations, including as to the radio. http://www.anythingbutipod.com/forum/showthread.php?t=25408 But this is from more than 2 years back–unknown if matters still work that way with the current firmware, _ and it could bork your player _.
Personally, I’d leave matters as they are and just ignore the radio. (I guess you also could try this with firmware from the time–the anythingbutipod.com Sansa Clip board has a repository of the Clip firmware: http://www.anythingbutipod.com/forum/showthread.php?t=22669.)
To try it, you would download whatever firmware you are going to apply, unzip the zipped file to get to the firmware file you need to apply to your Clip, change the letter of the unzipped file per the first thread above, and then apply the firmware to the player (instructions as to that are in the second thread above, and in the firmware upgrade sticky at the board here, at the top of the Clip forum).
If, by any chance, you try it, would be interesting to hear the result …
Once again, though, this could kill your player, and I’d advise against it, personally, unless you don’t care about that possibility …
Message Edited by Miikerman on 04-26-2010 06:52 PM