Possible Clues:

• Blade shaped to produce lift — I fear loo (anag)
• It provides a lift for those wanting to go up
• The shape of a plane’s wing
• Lifting surface
• Lifting section
• A warning about lubricant that may improve grip
• Scotch following chocolate: it could get you high
• ie a floor redesigned for wing, say
• Twice old flier is confused by a wing's cross-section
• A warning about lubricant: it gives you a lift