Hi Joanne ; sorry you have got a number of somewhat "flippant" answers to your question (mostly from me 'cos I was replying "out of core hours").
But the right-answer really comes down to your use-case, "getting data out of Clarity" happens all the time, for example when you log into Clarity and look at a screen, the data is "out of Clarity and into your head" - slightly more developed versions of that would be "run a portlet" (like Urmas suggests), "run a report" (like one of my flippant answers).
In truth my original "build a query web-service" answer (which is the simple to build NSQL query / SOAP option) would only be the "best" answer for a specific use-case (where you want to build some interface / repeatable process to get Clarity data into some other system).
So if you can describe your use-case a little more you might get some more specific (and less flippant from me!) direction!
Some previous discussions in this area might be (I'm sure there are many more);
Extracting Data from Clarity
Automating resource Clarity data to SharePoint
Automate file downloads from Clarity PPM