Possible Clues:

• Acrobat that’s often full of drink?
• Glass, one about to smash?
• ... one of those for circus performer
• Drinking vessel — part of a lock
• See acrobat in glass
• Circus artiste that can hold her drink?
• Glass element of lock
• Glass, one dropping to the floor?
• Acrobat — glass
• Circus performer, one able to hold drink