Lime (fruit)

A lime was a citrus fruit on Earth. Lime was often used to flavour drinks.

As a drink
Kadiatu Lethbridge-Stewart drank a jug of lime juice in a single pass. (PROSE: Happy Endings)

The Doctor
The Third Doctor preferred lime to lemon in his Bombay Sapphire Gin when he drank with Iris Wildthyme. (PROSE: Verdigris)