Mortiz,
I think they axed the clear button, and for good reason. It is a usability nightmare (see
this post) and has disappeared from the web along with spinning hit counters and animated construction GIFs.
You should be able to align labels right by editing the CSS of a particular form theme.
Unless your subscription to Marketo just started, you should still have access to Forms 1.0 if you need things to behave the same way.