The most common and most likely answer to this crossword clue is the 13 letter word KINDERGARTENS
I've seen this crossword clue in The Daily Telegraph
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More clues leading to the result KINDERGARTENS
Buddy explains!
The straight part
We know that "facilities for youngsters" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case facilities for youngsters = kindergartens.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 KINDERGARTENS mean?
KINDERGARTENS noun- An educational institution for young children, usually between ages 4 and 6; nursery school.
- The elementary school grade before first grade.
- The two levels between nursery and prep; the second and third years of preschool.