Related Clues:

• Canary cage fixture
• Feeder feature
• One of four in a square
• Geometry measurement
• Elevated seat
• See 23 Across
• Camera view
• Acute subject?
• Reporter's slant
• Birdcage accessory
• It might be acute or obtuse
• Trig calculation
• Lake catch
• Twig, to a bird
• Each one in a square is 90 degrees