George, for example, unites two men - its an awful mistake (6,5)
I believe the answer is:
patron saint
'george for example' is the definition.
(I know that Saint George is a patron saint)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for patron saint that I've seen before include "Matthew, of tax collectors; Luke, of physicians, etc" , "Religious guardian" , "Unearthly guardian" , "Andrew for Scotland, for example" , "For example, George" .)