"Hey there!" (4)
![Ross](/clue/static/ross-mug.min.png)
'hey there' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for psst that I've seen before include "Hissing noise to attract attention" , "Sibilant whisper to attract attention" , "Here's a secret" , "Don't tell anyone" , "Noise used to attract someone's attention privately" .)
(Other definitions for hiya that I've seen before include "modern form of salve?" , "Hello!" , "Informal 19 across" , "Informal greeting" .)
(Other definitions for you that I've seen before include "The solver" , "Reader" , "who never can tell" , "Second person pronoun" , "whoever's reading this" .)