The most common and most likely answer to this crossword clue is the 6 letter word CHOPIN
I've seen this crossword clue in The Guardian
C
H
O
P
I
N
More clues leading to the result CHOPIN
- Composer writing feature about opus
- Cut up in fast waltzer?
- Barman: c-climb aboard
- Hack confronting popular composer
- A composer, pianist and contralto: let me take you for a 21!
- Cut of meat popular with composer
- Cut popular 1D
- Hack elected to be a composer
- Writer of music cut out? On the contrary
- Pianist about to be given offer of lift?
Buddy explains!
The straight part
We know that "Barman" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case barman = chopin.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.