Answer: ruler

AnswerCrossword Clue
RULERIt can set things straight
RULERCommander
RULERFoot-long stick, often
RULERHead
RULERMeasuring aid
RULERSchool tool
RULERMeasuring tool
RULERHead of state
RULERMonarch or measure
RULERThrone occupant, frequently
RULERIt's for good measure
RULERKing or queen
RULERPencil box top, sometimes
RULERMicrosoft Word display option
RULERDictator
RULERGeometry class tool
RULERKing or Kaiser
RULERKing or emperor
RULERCrowned head
RULERSchoolbag item
rulerto strike with an implement for ruling lines
RULERPencil-box accessory
RULERMeasurement stick
RULERMeasuring stick
RULERDespot
RULERKnuckle rapper
RULERStraightedge
RULERSomething for good measure
RULERPharaoh, e.g.
RULERDynast
RULERRapper in class?
RULERLine item?
RULERThrone occupier
RULERDesk drawer item
RULERFoot-long stick
RULERStick for guidance
RULERLine-drawing aid
RULERStick in school
RULERFoot-long measurer
RULERIt's often a foot long