I adore it terribly, Steel's latest newspaper article (9)
I believe the answer is:
editorial
'newspaper article' is the definition.
(I've seen this before)
'i adore it terribly steel's latest' is the wordplay.
'terribly' indicates an anagram.
'latest' suggests the final letters.
The final letter of 'steel' is 'l'.
'i'+'adore'+'it'='iadoreit'
'iadoreit' with letters rearranged gives 'editoria'.
'editoria'+'l'='EDITORIAL'
(Other definitions for editorial that I've seen before include "Newspaper article - "I led a riot" (anag)" , "Article written" , "Newspaper opinion piece" , "Chief newspaper article" , "Article giving a newspaper's opinion" .)