Not better informed on either news broadcast (4,3,5)
I believe the answer is:
none the wiser
'not better informed' is the definition.
I know nothing about this answer so I can't tell whether this works.
'on either news broadcast' is the wordplay.
'broadcast' indicates anagramming the letters (letters scattered or cast around).
'on'+'either'+'news'='oneithernews'
'oneithernews' with letters rearranged gives 'NONE THE WISER'.
Can you help me to learn more?
(Other definitions for none the wiser that I've seen before include "unlike Ancient Mariner's listener the next day?" , "As ignorant as before" , "Still baffled" , "in the dark still" , "Still in ignorance" .)