Possible Clues:

• Caress cheek
• Isthmus - audacity
• It's risky to stick it out
• Cheek, and what is at the bottom of it
• Narrow part of e.g. isthmus
• Get romantic, in a way
• Part of a bottle or guitar
• Vampire's favorite body part
• Win margin
• Audacity to give just part of a bottle