The most common and most likely answer to this crossword clue is the 9 letter word KITTENISH
I've seen this crossword clue in The Daily Telegraph
K
I
T
T
E
N
I
S
H
More clues leading to the result KITTENISH
Buddy explains!
The straight part
We know that "playful" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case playful = kittenish.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 KITTENISH mean?
KITTENISH adjective- Having the qualities or likeness of a kitten.
- Playful, sometimes with overtones of female sexuality.