InDesign Text Always Overset Even in Large Text Frames

Text editor shows the text, but it’s always overset in the InDesign file, no matter how big I make the textbox or adjust the size/leading of the type. It’s an InDesign file that I didn’t create, so I deleted any existing paragraph styles and stripped out any formatting that was on it  but can’t figure out what is making any text I try to import or create automatically overset. What am I missing?