Mixed civet feed no good (9)
I believe the answer is:
defective
'mixed' is the definition.
(thesaurus)
'civet feed no good' is the wordplay.
'no good' is an anagram indicator (no good can mean faulty or defective).
'civet'+'feed'='civetfeed'
'civetfeed' with letters rearranged gives 'DEFECTIVE'.
(Other definitions for defective that I've seen before include "Flawed" , "insufficient" , "Faulty" .)