As far as I know this is so hard to do that you'll probably don't want to do it.
There's always a dynamic playlist.
There is no way to clear the list without stopping play.
You can only remove single songs from it.
To do this you go to
Context-Menu, Playlist, View Current Playlist.
On each title you want to remove, hold select, then select remove.
Once you got the dynamic playlist down to one track, select all
tracks in the file browser and add them via Playlist,Insert Last.