Answer: hushup

AnswerCrossword Clue
HUSHUP

Stonewall it

HUSHUP

Keep secret, as a scandal

HUSHUP

Keep under wraps

HUSHUP
Keep quiet
HUSHUP
"Quiet!"
HUSHUPKeep under one's hat.
HUSHUPQuiet down.
HUSHUPBecome quiet
HUSHUPKeep secret
HUSHUP"Keep quiet!"
HUSHUPKeep it quiet
HUSHUPConceal