The most common and most likely answer to this crossword clue is the 6 letter word JOANNA
J
O
A
N
N
A
Buddy explains!

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 JOANNA mean?
JOANNA noun- (often "old joanna") A piano.