"Complete ___ Guides" (how-to series)

IDIOTS

Think of a humorous term for people who might need very basic instructions.

This clue refers to the popular book series "Complete Idiot's Guides," which offers beginner-friendly how-to manuals on various topics. The answer "IDIOTS" fits because it completes the well-known title, and the word "complete" in the clue hints at the full series name. The phrase plays on the idea of making complex subjects simple enough for anyone to understand.