The term 'did major editing' refers to the process of re-writing or revising a piece of writing. The crossword solution for this term is 'rewrote', which means to write again or to revise. Rewriting is an important part of the editing process, as it allows for the writer to make changes to the content and structure of the text. This can include adding or removing information, changing the order of sentences, and making other adjustments to improve the overall quality of the writing.