The most common and most likely answer to this crossword clue is the 5 letter word LAGER
I've seen this crossword clue in The Times
L
A
G
E
R
More clues leading to the result LAGER
Buddy explains!

The straight part
We know that "drink" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case drink = lager.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does LAGER mean?
LAGER noun- A type of beer, brewed using a bottom-fermenting yeast.
- To store (lager beer) at a low temperature for maturing and clarification.
- A defensive encampment encircled by wagons, especially by South African Boers.
- A temporary formation of armoured vehicles for resupply.
- To arrange in a circular formation for defence.
- To camp in a circular formation.