Possible Clues:

• No sax on them? It's all a matter of degree
• From Britain, to a certain degree
• Figures formed by two lines meeting
• Fishermen's corners?
• To a certain degree they are old folk
• Fishes for perspectives?
• Spaces between lines that meet
• Space between two lines at a corner
• The fishy way one gets one's degrees
• How one goes fishing, but only to a certain degree