Related Clues:

• Horse opera
• Shoot-'em-up
• Jupiter's domain
• Shade of blue
• Western
• Heaven
• Heavens
• Blue hue
• Place for a plane
• Many a Gary Cooper pic
• Hit high into the air
• 'They Died With Their Boots On,' e.g.
• See 21-Across
• Wild blue yonder
• Blue shade