Possible Clues:

• Don't slacken when flying a kite?
• "Don't stop now!"
• Apt cry of encouragement for a pilot?
• Soldier on set I look to knock over
• 'Hang in there'
• "Hang in there"
• Compliment for an airline?
• 'Don't stop now!'
• Place I look to ascend, given encouragement to endure
• Encouraging words