Cold one

BREW

Think of a chilled beverage often enjoyed at a pub, especially when it’s made from fermented grains.

Cold one" is a casual term for a beer, often used when someone’s offering or asking for a drink. The answer "BREW" fits because it’s short for "homebrew" or just a general word for beer, especially in a relaxed setting. The clue plays on the idea of beer being served cold, so it’s a straightforward but slightly playful hint.