The most common and most likely answer to this crossword clue is the 7 letter word BACARDI
I've seen this crossword clue in Independent
B
A
C
A
R
D
I
More clues leading to the result BACARDI
- Tipple linesman downs about lunchtime?
- Rum, playful talk? Not half!
- Something to mix with coke making graduate woolly
- AC/DC covering a Christmas staple? That’s rum
- Rum barrels in front of top-class drinking club?
- Rum served by saloon, perhaps in poor island
- Drive a vehicle to the north island for a drink
- Sort of blood seen around clothes item shortly needing white spirit
- Rum eccentric type lured into temptation endlessly
- Rum served in saloon in anything but Holy Island
Buddy explains!

The straight part
We know that "Rum" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case rum = bacardi.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.