The answer to the meta is a phrase that describes the theme of this puzzle
This is a redo of https://crosshare.org/crosswords/CyWVsLIDqsdjEeyfJDaS/principal-ideal-original which had a small error on my part. You can still do it and you can figure what I probably meant for the meta. But this one doesn't have the error. (But I kind of liked the clues and entries of the original better).