Failing, saver turned the other way (4,5)
I believe the answer is:
vice versa
'failing saver turned the other way' is the definition.
I can't tell whether this definition defines the answer.
'failing saver turned' is the wordplay.
'failing' becomes 'vice' (vice can mean a moral failing).
'turned' indicates an anagram.
'saver' with letters rearranged gives 'versa'.
'vice'+'versa'='VICE VERSA'
Can you help me to learn more?
(Other definitions for vice versa that I've seen before include "With parts the other way round" , "In reverse order" , "back to front" , "film" , "The opposite (also applies)" .)