Answer: sitstight

AnswerCrossword Clue
SITSTIGHTStays put
SITSTIGHTDoesn't budge an inch
SITSTIGHTWaits
SITSTIGHTTakes no action
SITSTIGHTRemains silent: Colloq.
SITSTIGHTAwaits developments patiently
SITSTIGHTWaits and sees