Related Clues:

• Do some ballooning
• Be up in the air
• Ride a thermal
• Take to the air
• Increase rapidly
• Really get up
• Fly like the eagles
• Eagles do it
• Hang-glide, e.g.
• Heat up
• Do some high flying
• Rise to great heights
• Fly like a hawk
• Go sky-high
• Skim the clouds