The most common and most likely answer to this crossword clue is the 7 letter word LIQUEUR
I've seen this crossword clue in Independent
L
I
Q
U
E
U
R
More clues leading to the result LIQUEUR
- Current unfinished row between Left and Right in Curacao, say
- Fifty-one line up endlessly on right for a drink
- Endless line of people in the money, no longer in need of a drink
- Drink line, one line not fully supplied by vintner, ultimately
- One endless line between two sides for cordial
- Discuss best remedy for drink
- One endless line in both directions for something to drink
Buddy explains!

The straight part
We know that "Curacao, say" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case curacao, say = liqueur.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 LIQUEUR mean?
LIQUEUR noun- A flavoured alcoholic beverage that is usually very sweet and contains a high percentage of alcohol. Cordials are a type of liqueur manufactured using the infusion process as opposed to the essence and distillation processes.
- To flavor or treat (wine) with a liqueur
- To top up bottles of sparkling wine with a sugar solution