come on everyone... this must be a very simple question... someone out there must be able to give a quick answer...
Hi Phillip, you can just write an statement like this:
private var myClip:MovieClip;
But in Flex it'll be kinda useless since AS 3 doesn't allow you to programmatically control a movieclip playhead that's why you use Sprite as your parent container when you develop a pure AS 3 project in Flex, but you can embed an animation or load it at runtime using SWFLoader.
Hope this helps.