Reported new part of speech within one day (9)
I believe the answer is:
announced
'reported' is the definition.
(I've seen this before)
'new part of speech within one day' is the wordplay.
'new' becomes 'n' (abbreviation as in New Testament NT).
'part of speech' becomes 'noun' (noun is a part of speech).
'within' indicates putting letters inside.
'one' becomes 'ace' (ace has a value of one in some card games).
'day' becomes 'd' (abbreviation for day).
'n'+'noun'='nnoun'
'nnoun' going within 'ace' is 'announce'.
'announce'+'d'='ANNOUNCED'
(Other definitions for announced that I've seen before include "Proclaimed" , "Declared publicly" , "Revealed" , "reported" , "published" .)