Incapable of Going Wrong
This page is the CodyCross answer for the clue below from Resorts, Group 541, Puzzle 5 (Helpful Staff).
Question is: Incapable of Going Wrong
and the answer is: FOOLPROOF
Word Meaning:
FOOLPROOF — Of a device: protected against, or designed to be proof against, misuse or error.
Definitions from Wiktionary.