We sometimes hire fresh grads without a clearance, but experienced hires are generally expected to already have them. It's not cheap (and definitely not fast) to get someone a clearance. Though, some companies/contracts/projects are probably more flexible on this, especially if they have something unclassified you can work on while they wait for your clearance to come through.
Sounds like the problem is one entirely of your company's making.
[1] Some companies will try to put you through for higher clearances than you actually need right now in anticipation of future work, but they aren't supposed to.
I would think even with clearance you can't actually get information you don't need to know, such as information on a project you're not working on.