The most common and most likely answer to this crossword clue is the 10 letter word STONEHENGE
I've seen this crossword clue in The Times
S
T
O
N
E
H
E
N
G
E
More clues leading to the result STONEHENGE
- Man securing English gem set first in ancient ring
- Whole chicken gets cooked outside tourist site
- Old monument then goes with new, not entirely surprisingly
- 14lb chicken, perhaps, served up for rock group
- Monument gets rebuilt without a single layer
- Cook goes with net to catch chicken in ancient monument
- Rock group gets none and he must be upset!
- Rock chick on fringes of groupie circle
- Prehistoric monument seen on the ground, inspiring gasps initially
- Free? Then go see round new tourist attraction
Buddy explains!
The straight part
We know that "ancient ring" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case ancient ring = stonehenge.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.