Related Clues:

• Sign of the Zodiac - actor
• Person in authority
• Person in charge of country
• Person in power - can draw a line
• Aid to drawing straight lines
• Standard base for comparison
• Measure against which to make comparison
• Aid for a straight line
• Monarch - drafting tool
• Device to measure quantity used of fluid, electricity etc
• School exam
• Strip used in drawing straight lines
• Balance — climbs
• 'This is only a ___'
• Criterion — means of measuring