The most common and most likely answer to this crossword clue is the 4 letter word PSST
P
S
S
T
More clues leading to the result PSST
- Notice me preparing small silver tray for starters
- Here's a secret spy's oddly concealed, by the way
- Here’s a secret I’d like to add, by the way
- Saints in port — it should attract attention
- . Hey! Something interesting from Bishop’s Stortford!
- Primarily: private, sibilant surreptitious tone?
- PSST
- Listen to me: some apps stink
- Look here‘s ship entering port empty
- During training, sons call for attention
Buddy explains!

The straight part
We know that "Call to attention" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case call to attention = psst.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 PSST mean?
PSST verb- To say psst, to get someone's attention or to communicate with them.
- Implies that the speaker is sending secret or whispered information to another person.