Three different articles by mum one detested (8)
I believe the answer is:
anathema
'one detested' is the definition.
(anathema means something that is detested)
'three different articles by mum' is the wordplay.
'three different' becomes 'an' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'articles' becomes 'a the' ('a' and 'the', indefinite and definite articles).
'by' says to put letters next to each other.
'mum' becomes 'ma' (ma can mean mother).
'an'+'athe'+'ma'='ANATHEMA'
Can you help me to learn more?
(Other definitions for anathema that I've seen before include "One detested, cursed" , "detestable" , "hated person" , "Curse - church ban" , "Curse of the Church, or detested person" .)