Possible Clues:

• X co-ordinate is say, not Y, subordinate to a degree
• X-coordinate of a point
• Co-ordinate with a graduate going abroad in first class return
• A degree — is it the value of a coordinate?
• Distance from a point on a graph to the vertical axis
• Graph's x-coordinate
• Co-ordinate with a graduate from central Mississippi academy
• Coordinate classics baccalaureate that's partly rejected
• X-coordinate
• In analytical geometry, the x-co-ordinate