Shorthand for unnamed co-authors Crossword Clue

 The shorthand for unnamed co-authors in a crossword clue is ETAL. It is an abbreviation of the Latin phrase "et alii" which means "and others". It is often used in academic writing to refer to a group of authors who are not all named.

Here are some other examples of how the shorthand ETAL can be used in a crossword clue:

"Authors of a book, informally"

"Unnamed co-writers"

"People who wrote a paper together"

"The folks who wrote this article"

"The authors of this book, not including the editor"

I hope this helps!