The most common and most likely answer to this crossword clue is the 5 plus 8 letter word CHARM BRACELET
I've seen this crossword clue in The Daily Telegraph
C
H
A
R
M
B
R
A
C
E
L
E
T
More clues leading to the result CHARM BRACELET
Buddy explains!
The straight part
We know that "article worn on the wrist" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case article worn on the wrist = charm bracelet.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.