The most common and most likely answer to this crossword clue is the 8 letter word JEWELLED
J
E
W
E
L
L
E
D
Buddy explains!
The straight part
We know that "stoned" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case stoned = jewelled.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 JEWELLED mean?
JEWELLED verb- To bejewel; to decorate or bedeck with jewels or gems.
- Set with jewels