Northern big cat died after article's published (9)
I believe the answer is:
announced
'published' is the definition.
(thesaurus)
'northern big cat died after article's' is the wordplay.
'northern' becomes 'n' (abbreviation e.g. N. Ireland).
'big cat' becomes 'ounce' (ounce is a kind of big cat**).
'died' becomes 'd'.
'after' says to put letters next to each other.
'article' becomes 'an' (indefinite article).
'n'+'ounce'+'d'='nounced'
'nounced' put after 'an' is 'ANNOUNCED'.
(Other definitions for announced that I've seen before include "Revealed" , "Declared publicly" , "published" , "reported" , "Proclaimed" .)