Answer: firedrill

AnswerCrossword Clue
FIREDRILLSchool evacuation exercise
FIREDRILLOne reason a school will empty out
FIREDRILLSchool exercise
FIREDRILLSchool emergency training
FIREDRILLSafety run-through
FIREDRILLSafety-based rehearsal
FIREDRILLOffice safety routine
FIREDRILLGrade-school ritual
FIREDRILLSchool evacuation practice
FIREDRILLImportant school practice.
FIREDRILLSchool event.
FIREDRILLBell or whistle getting set off for safety run-through (4,5)
FIREDRILLSafety exercise prompted by an alarm
FIREDRILLTree branches to practice run?
FIREDRILLSchool exercise involving leaving one's seat