Article — no good — by hack, Polish language speaker (10)
I believe the answer is:
anglophone
'speaker' is the definition.
Both the answer and definition are singular nouns.
Maybe there's an association between them I don't understand?
'article no good by hack polish language' is the wordplay.
'article' becomes 'a' (the indefinite article in English).
'no good' becomes 'ng' (abbreviation).
'by' means one lot of letters go next to another.
'hack' becomes 'lop' (both can mean to cut up).
'polish language' becomes 'hone' (I am not sure about this - if you are sure you should believe this answer much more).
'a'+'ng'+'lop'+'hone'='ANGLOPHONE'
Can you help me to learn more?
(Another definition for anglophone that I've seen is " English-speaking".)