Possible Clues:

• Shot in the eye!
• Device for measuring gin etc
• One dispenses with standard measures to elect one conservative
• Measure associated with Betty Martin
• Sort of nerve shown by bar assistant
• Seeing that I work with a jerk
• Bar measure a tricky topic?
• Device for dispensing measures of spirits
• To choose, I see, to see with it
• Drinking spirits in the bar, you'll get it in the neck!