The most common and most likely answer to this crossword clue is the 8 letter word GODCHILD
I've seen this crossword clue in The Guardian
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More clues leading to the result GODCHILD
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.
What does GODCHILD mean?
GODCHILD noun- A child whose baptism is sponsored by a godparent. In some cases the relationship is maintained indefinitely, with the godchild being treated much like a niece or nephew.