Yes, you can use the Zune with WMP11:
http://www.zuneboards.com/content/view/308/1/
But it's a hack and I don't know how well it works. I personally think that the Zune software is quite nice, and I use it instead of WMP11 on all my computers now. But since you have a Clix, you can't sync that with the Zune software.
On the other hand, there's no reason why you can't use the Zune software to manage the Zune, and keep using WMP11 to manage to your Clix. Point both pieces of software at the same music directory, and it will work great.
Or, get a SanDisk Sansa instead of a Zune.
