Crossword Genius

Everlasting, timeless, unethical (7)

Ross

I believe the answer is:

immoral

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'unethical' is the definition.
(synonyms)

I don't understand the rest of the clue.

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(Other definitions for immoral that I've seen before include "Not conforming to accepted rules of conduct, particularly in sexual matters" , "Licentious - dissolute" , "dishonest" , "Evil" , "Without a sense of right and wrong" .)

I've seen this clue in The Daily Mail.
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