Crossword Genius

Good-for-nothing wife alters plan (7)

Ross

I believe the answer is:

wastrel

Here is my best explanation:

'good-for-nothing' is the definition.
(thesaurus)

'wife alters plan' is the wordplay.
'wife' becomes 'w'.
'plan' indicates an anagram (plan can mean organise).
'alters' anagrammed gives 'astrel'.
'w'+'astrel'='WASTREL'

This clue was last seen in Mirror