Possible Clues:

• What's highlighted in some makeup tutorials
• Hard part of face
• One holds up chap with chutzpah, British ace
• Facial feature
• Lip can be funny - it's one of the model's assets
• Audacity from one behind note is a thing of beauty when high
• Part of facial structure
• Speak impertinently to individual carrying key part of skeleton
• Structure beneath the eye
• Supermodel's asset, often