Situation: You have a text object on a Word Processing document that you can select but cannot edit.
Solution: Select the text object and choose Move to Front from the Arrange menu.
Since the typing area of a ClarisWorks word processor is essentially a text frame, if you send a text object backward, you actually are putting it behind the typing area. This makes it selectable by the arrow tool, but not editable with the text tool. Selecting the object and bringing it to the front will make it editable.