Never to be forgotten with the passing of time? Wrong (7)
I believe the answer is:
immoral
'wrong' is the definition.
(similar in meaning)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for immoral that I've seen before include "Corrupt - dissolute" , "Dissolute or unprincipled" , "Without values" , "Unprincipled or debauched" , "Without a sense of right and wrong" .)