The most common and most likely answer to this crossword clue is the 9 letter word PUBLISHER
I've seen this crossword clue in The Guardian
P
U
B
L
I
S
H
E
R
More clues leading to the result PUBLISHER
- Supplier protecting this writer, following book launch, primarily
- Bookmaker liable to be damned?
- Bookmaker and boozer relish revels
- First of lads in bar is the woman’s bookmaker!
- Penguin‘s blueish ruffles breaking up pair?
- Turn up with Batman at the start, relish fighting Penguin?
- Bookmaker sees local woman, 51, before start of race
- Dealer going about business with literary intentions, initially?
- Wellington’s damned bookmaker
- Bar quiet during story by Republican newsman
Buddy explains!

The straight part
We know that "Bookmaker" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case bookmaker = publisher.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 PUBLISHER mean?
PUBLISHER noun- One who publishes, especially books.