Wrong clue? A hint rewritten (9)
I believe the answer is:
unethical
'wrong' is the definition.
(associated in meaning)
'clue? a hint rewritten' is the wordplay.
'rewritten' indicates anagramming the letters.
'clue'+'a'+'hint'='clueahint'
'clueahint' anagrammed gives 'UNETHICAL'.
(Other definitions for unethical that I've seen before include "Unscrupulous in business or professional conduct" , "Not conforming to moral standards" , "In breach of business principles" , "Shady" , "Not morally correct" .)