Old folk? They're sometimes right (6)
I believe the answer is:
angles
I'm afraid I can't even guess how this answer relates to the clue.
Can you help me to learn more?
(Other definitions for angles that I've seen before include "They may be acute, obtuse or right" , "1 across have three" , "old Germanic tribespeople" , "crooks" , "Spaces between lines that meet" .)