The most common and most likely answer to this crossword clue is the 9 letter word YOUNGSTER
Y
O
U
N
G
S
T
E
R
More clues leading to the result YOUNGSTER
- At last stubbly nurse got reconditioned shaver
- Frightfully grey? Not us, kid!
- Solver gets extremely near solution for one of the above
- Minor problem with Gents: solver’s outside
- Kid‘s toy gun’s broken with little hesitation
- Child’s potty gone rusty
- Shaver‘s strangely gone rusty
- Canadian rock star disturbed rest for child
- What a boy or girl is before getting out of teens
- Solver, hoodlum's leaving Georgia as juvenile
Buddy explains!

The straight part
We know that "Kid" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case kid = youngster.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 YOUNGSTER mean?
YOUNGSTER noun- A young person.