The most common and most likely answer to this crossword clue is the 9 letter word HARBINGER
I've seen this crossword clue in The Daily Telegraph
H
A
R
B
I
N
G
E
R
More clues leading to the result HARBINGER
- Daughter leaves serious drinker, a sign of things to come
- Herald's endless worry holding orgy
- Endless charm shown by heavy drinker, indicator of what comes next
- Bring her a sinister omen
- Not unknown for prince to hold drinking bout — a sign of the future?
- Her baring could be sign of what is to come
- Warning bitter’s cut short by boozer
- Messenger is alcoholic almost, one inclined to overindulgence
- Warning heavy drinker after detailed damage
- Warning sign from mostly tough heavy drinker
Buddy explains!
The straight part
We know that "Warning" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case warning = harbinger.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 HARBINGER mean?
HARBINGER noun- A person or thing that foreshadows or foretells the coming of someone or something.
- One who provides lodgings; especially, the officer of the English royal household who formerly preceded the court when travelling, to provide and prepare lodgings.
- To announce or precede; to be a harbinger of.