I defy you to be angry about article (2,5)
I believe the answer is:
so there
'i defy you' is the definition.
('so there' is said in defiance)
'angry about article' is the wordplay.
'angry' becomes 'sore' (similar in meaning).
'about' indicates putting letters inside.
'article' becomes 'the' (the definite article in English).
'sore' going around 'the' is 'SO THERE'.
'to be' is the link.
(Other definitions for so there that I've seen before include "defiant expression" , "message of defiance" , "That will teach you!" , "Defiant words" , "What are you going to do about that" .)