The most common and most likely answer to this crossword clue is the 9 letter word HEADLINES
H
E
A
D
L
I
N
E
S
Buddy explains!

The straight part
We know that "Prime news" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case prime news = headlines.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does HEADLINES mean?
HEADLINES noun- The heading or title of a magazine or newspaper article.
- The line at the top of a page containing the folio or number of the page.
- (entertainment) The top-billed attraction.
- A headrope.
- Important news stories