Related Clues:

• Beginning with athlete or cycle
• Geometrical prefix
• Angular front?
• Start of a cycle?
• State starter?
• Angle attachment
• Prefix with color or cycle
• Angular lead-in
• Env. shape
• Prefix with syllabic
• Angle opening?
• One of the Nixons
• One of the Ts in TNT
• Not quite quadri-
• Half of hex