Related Clues:

• Region in which there could be intersecting planes
• Going up river valley to obscure spot above the ground
• In process of flight
• Where to find Milton's Zophiel, last of cherubim I defy, we hear
• Surrounded by endless bog, mountain appears in the clouds?
• Dairy almost closes after half the milk goes off, getting high
• Halfway up in region well above the ground?
• Up here is arid -- I'm flying
• Welshman in Russian space station in the sky
• Above-ground
• Like some jet refuelings
• Like some fighter jet refueling
• I join Bond's boss arranging raid above ground level
• Where balls are often caught
• Like some catches and crashes