The most common and most likely answer to this crossword clue is the 8 letter word LAPIDARY
L
A
P
I
D
A
R
Y
More clues leading to the result LAPIDARY
- 400m? Record seeing one take first place in commemorative style
- Like memorial words daughter inscribed in large beehive?
- Stones expert, with new iPad to hand, cuts song
- Pithy form of daily prayer
- A rapidly replaced stone worker
- Arrangement for April day set in stone
- A rapidly developing jeweller
- I cut start of race run during day
- Stone-cutter‘s paid early maybe, but missing final cheque
- Friend backs rewriting diary of engraver
Buddy explains!

The straight part
We know that "set in stone" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case set in stone = lapidary.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 LAPIDARY mean?
LAPIDARY noun- A person who cuts, polishes, engraves, or deals in gems.
- An expert in gems or precious stones; a connoisseur of lapidary work.
- A treatise on precious stones.
- Pertaining to gems and precious stones, or the art of working them.
- Suitable for inscriptions; efficient, stately, concise; embodying the refinement and precision characteristic of stone-cutting.