Related Clues:

• Narrow tube in chemistry
• Item of chemistry lab glassware
• Chemist's tube
• Calibrated tube
• Chemistry lab item of glassware
• Dark-haired woman's career put out by old city lab equipment
• Eyedropper, essentially
• Spread butter, with end of knife that's used to deliver liquid
• Tube for liquid in mine covering domestic source of electricity
• Drop producer's best sci-fi films back-to-back
• Favourite time, tucking into dessert? One could shift some drink