Possible Clues:

• "Uninvited, unexpected ––s-in lured off the high road" (Virginia Woolf, Between the Acts)
• Small tube with a rubber bulb at one end
• Word with "eye" or "name"
• Tube for dispensing small amounts of liquid
• Cap removed from element by GP, one releases medicine
• Tube for applying liquid
• Person who may lose something in the tube
• Medicine dispenser, and, in another way, a hint to the answers to starred clues
• One can't catch something in the dispensary
• Pipette seen in operation for each succeeding doctor