Answer: onduty

AnswerCrossword Clue
ONDUTYWorking
ONDUTYAt one's post
ONDUTYWorking as scheduled
ONDUTYTaxi sign
ONDUTYPatrolling, perhaps
ONDUTYAt one's station
ONDUTYWorking, as a police officer
ONDUTYWorking the desk, say