The most common and most likely answer to this crossword clue is the 10 letter word MONDEGREEN
I've seen this crossword clue in The Daily Telegraph
M
O
N
D
E
G
R
E
E
N
Buddy explains!
The straight part
We know that "misheard lyrics" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case misheard lyrics = mondegreen.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 MONDEGREEN mean?
MONDEGREEN noun- A form of error arising from mishearing a spoken or sung phrase.
- A misunderstanding of a written or spoken phrase as a result of multiple definitions.