The most common and most likely answer to this crossword clue is the 6 letter word BRACER
I've seen this crossword clue in The Times
B
R
A
C
E
R
More clues leading to the result BRACER
Buddy explains!
The straight part
We know that "that drink's stimulating" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case that drink's stimulating = bracer.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 BRACER mean?
BRACER noun- That which braces, binds, or makes firm; a band or bandage.
- A covering to protect the arm of the bowman from the vibration of the string.
- Armor for the forearm; a brassard.
- A medicine, as an astringent or a tonic, which gives tension or tone to any part of the body.