The most common and most likely answer to this crossword clue is the 9 letter word MOUTHWASH
I've seen this crossword clue in Financial Times
M
O
U
T
H
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H
More clues leading to the result MOUTHWASH
Buddy explains!
The straight part
We know that "Liquid refreshment stimulating the palate?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case liquid refreshment stimulating the palate? = mouthwash.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 MOUTHWASH mean?
MOUTHWASH noun- A liquid used to clean one's mouth.