The most common and most likely answer to this crossword clue is the 9 letter word OFFSPRING
I've seen this crossword clue in The Sunday Telegraph
O
F
F
S
P
R
I
N
G
More clues leading to the result OFFSPRING
- Children belonging to start of fruitful season?
- Children not keen on first part of The Four Seasons
- Rotten season for the Cubs?
- Bad time of year to make babies?
- Children on holiday over three months
- Mouldy hop seed
- Bad time of year for litter
- Litter produced in high season
- Bound to follow bad issue
- Children bound to follow at a distance
Buddy explains!

The straight part
We know that "Kids" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case kids = offspring.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 OFFSPRING mean?
OFFSPRING noun- A person's daughter(s) and/or son(s); a person's children.
- All of a person's descendants, including further generations.
- An animal or plant's progeny or young.
- Anything produced; the result of an entity's efforts.
- A process launched by another process.