Offended about article giving words of derision (2,5)
I believe the answer is:
so there
'words of derision' is the definition.
'offended about article' is the wordplay.
'offended' becomes 'sore'.
'about' indicates putting letters inside.
'article' becomes 'the' (the 'definite article' part of speech).
'sore' going around 'the' is 'SO THERE'.
'giving' acts as a link.
(Other definitions for so there that I've seen before include "message of defiance" , "Defiant statement" , "Defiant remark" , "Derisive expression" , "That will teach you!" .)