Related Clues:

• Line of symmetry
• Shrewd
• x or y, e.g.
• Severe
• x, y or z
• Stem
• Allies' foe in W.W. II
• Urgent
• Pivotal point
• Razor-sharp
• The second cervical vertebra
• Coordinate system line
• Main line?
• Kind of angle
• Like some accents