The most common and most likely answer to this crossword clue is the 5 plus 10 letter word FAIRY GODMOTHERS
I've seen this crossword clue in The Guardian
F
A
I
R
Y
G
O
D
M
O
T
H
E
R
S
Buddy explains!
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.