The most common and most likely answer to this crossword clue is the 8 letter word GODCHILD
G
O
D
C
H
I
L
D
More clues leading to the result GODCHILD
Buddy explains!
The straight part
We know that "one sponsored at a baptism" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case one sponsored at a baptism = godchild.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.