The most common and most likely answer to this crossword clue is the 9 letter word BUBBLEGUM
I've seen this crossword clue in Financial Times
B
U
B
B
L
E
G
U
M
Buddy explains!
The straight part
We know that "Pop music perhaps" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case pop music perhaps = bubblegum.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 BUBBLEGUM mean?
BUBBLEGUM noun- (usually uncountable) A sweet chewing gum formulated to be stretchy so the chewer can blow bubbles with it.
- (sometimes derogatory) A type of pop music marked by sweetness, pep and charm (rather than depth or complexity).
- A light pink colour, like bubblegum.
- Tasting like bubblegum
- By extension, sweet, perky, or youthful