The most common and most likely answer to this crossword clue is the 9 letter word ABSINTHES
I've seen this crossword clue in Independent
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The straight part
We know that "strong drinks" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case strong drinks = absinthes.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 ABSINTHES mean?
ABSINTHES noun- The herb absinthium Artemisia absinthium (grande wormwood); essence of wormwood.
- Bitterness; sorrow.
- A distilled, highly alcoholic, anise-flavored liquor originally made from grande wormwood, anise, and other herbs.
- A moderate yellow green; absinthe green.
- Sagebrush.