Related Clues:

• x or y, e.g.
• x, y or z
• Stem
• Female G.I.
• W.W. II female
• Allies' foe in W.W. II
• Pivotal point
• The second cervical vertebra
• Coordinate system line
• Main line?
• Cartography clerk in WWII, perhaps
• WWII medical technician, perhaps
• Alliance
• On what the earth turns
• Allies' adversary