Related Clues:

• Acute, as vision
• Less than 90 degrees, anglewise
• Like an angle that's less than 90 degrees
• Like an eagle's eye
• Angle that's smaller than 90 degrees
• Not chronic, as illness
• Like a 45° or 60° angle
• Old-time radio sleuth
• Like many triangle angles
• Less than 90°, as an angle
• Angle of less than 39 degrees
• Sharp angle?
• Having a fine edge to weep over the dead
• Sharp or eager
• Sharp or crucial