That is not possible. You cannot link yor xbox status or clan into your steam account. Steam is for steam and xbox live is for xbox.
You would have to buy ghosts for PC if you wanted to do that.
You can actually link your Xbox Live, Steam, and PSN accounts on one COD account. And since the clan for Ghosts is cross-platform, you can help your clan on winning the Clan Wars as long as your Xbox Live account is linked on the COD account where your Steam account is linked.
Hope this helps.
I have been playing on steam and have all my stats on steam. If I link my xbox account to my cod account, and start playing on xbox will I have all my equipment and stats on xbox aswell or are they separate?