Hey there, it is possible since 5.0.x to clear the song using the slideout menu instead of using the Play / Stop All button.
5.1.1 is now on wifi with this workaround available and we are currently on beta 5.2.0
To do this, press and hold the bottom left Aeros button until the slideout menu appears, use the wheel to scroll and highlight the Clear Song option, and use the right Aeros button to select the option (in 2x2 either the middle or right button will work).
The Hands Free slideout menu can be edited to reorganize and hide/show the available options. There are two slideout menus: Playing and Stopped. The Clear song option is available on the Stopped slideout menu.
I will tag this as implemented