The phrase "to need an editor" means that something, like a piece of writing or a project, requires someone to review, correct, and improve it before it is considered complete or high-quality.
Sentences with «to need an editor»
That said, they also don't need an editor who is so brutal they never want to pick up a pen again. (thewritelife.com)
Of anyone in the world, I should be the most likely person to not need an editor for my own flash fiction, right? (castlegatepress.com)
Every writer needs an editor — and your future readers deserve one. (independent-authors.com)