Possible Clues:

• What a fishy way to behave! It's all a matter of degree
• Each one in a square is 90 degrees
• A way of approaching fish
• Try to catch crook
• What a sleazy promoter has
• Old English settler's point of view
• It may be right or acute
• Fish that's found between rays
• That would be a fishy way to get your degrees
• Be fishy to a degree