The most common and most likely answer to this crossword clue is the 5 letter word CRIER
I've seen this crossword clue in Financial Times
C
R
I
E
R
More clues leading to the result CRIER
- Councillor that is right for reader of proclamations
- Herald: animal time and again escaping
- Official announcer in Cork I hear regularly
- Town official rather a baby?
- Former newsreader, American guy, missing Times
- He proclaims king that is wearing crown
- Public announcer given credit by current queen
- Mourner making carriage return, coffin bearer having mislaid lid?
- He can’t laugh — he’s got an announcement to make
- Person yelling “Score!” in ear, off and on
Buddy explains!

The straight part
We know that "Public announcer" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case public announcer = crier.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 CRIER mean?
CRIER noun- One who cries.
- An officer who proclaims the orders or directions of a court, or who gives public notice by loud proclamation, such as a town crier.