Answer: pssts

AnswerCrossword Clue
PSSTSCalls for attention?
PSSTSAttention-getters
PSSTSAttention getters
PSSTSSoft vocal signals
PSSTSAttention-getters, maybe
PSSTSAttention-getting sounds
PSSTSCalls for attention
PSSTSSibilant summonses
PSSTSSibilant attention-getters
PSSTSVerbal attention-grabbers
PSSTSSibilant signals.
PSSTSAttention-getting sounds.
PSSTSSibilant sounds.
PSSTSSibilant sounds
PSSTSSecret words?
PSSTSSounds from test cheaters, maybe