The phrase "to find an editor" means to search for and hire someone who can review, improve, and correct written material before it is published or shared. Full definition
Writing your book is the first step, but there are lots of hurdles to overcome, such as finding an editor, cover artist or just getting your table of contents formatted correctly. (goodereader.com)
Editing IS part of writing, and for writers who find it hard should learn, instead of finding editors for the rest of their career. (thewritelife.com)
At the time there was really only one way of doing this: You got an agent, who found you an editor who convinced their publishers to take on your book. (bookpromotion.com)