There is nothing built into Form Wizard Pro for this, but one option is to use JavaScript to force a page refresh. Form Wizard Pro will lose anything typed in when the page refreshes.

To do this, create a separate HTML feature on the page that contains your form. In the HTML editor, go into the raw HTML view and paste:

<input onclick="history.go(0)" type="button" value="Clear Form" />

Save, and you'll have a button that says "Clear Form" and should do what you want.

Jamie