The most common and most likely answer to this crossword clue is the 6 letter word ALERTS
I've seen this crossword clue in Independent
A
L
E
R
T
S
Buddy explains!

The straight part
We know that "Warnings" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case warnings = alerts.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 ALERTS mean?
ALERTS noun- An alarm.
- A notification of higher importance than an advisory.
- A state of readiness for potential combat.
- To give warning to.