The most common and most likely answer to this crossword clue is the 1 plus 5 plus 5 letter word A SWEET TOOTH
I've seen this crossword clue in The Guardian
A
S
W
E
E
T
T
O
O
T
H
More clues leading to the result A SWEET TOOTH
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.