It is possible to do that. It sounds a bit distorted still but when you turn the volume pot down on your guitar, it slowly cuts out the sound (like one of those lights you can vary the light)
you're thinking "duh, i know that" but if you think about it, it's slowly cutting the signal down, and eventually you get nothing. This applies to the distortion as well, as when you turn down the volume, the distortion goes down but clean still comes out slightly moreso than the distortion. hence you can turn the knob down and still get a clan sound (mind you, itll still be a bit distorted)
Hope I don't sound like a rambling moron
