The most common and most likely answer to this crossword clue is the 10 letter word SERPENTINE
I've seen this crossword clue in The Times
S
E
R
P
E
N
T
I
N
E
More clues leading to the result SERPENTINE
- Cage, metal, in dry lake
- Dark green mineral Newton discovered in rocky pine trees
- Mineral water created in London
- Windy river, confined in another river
- Rock is something that people can see in Hyde Park
- Cryptic entries cracked by writer like me
- Winding river engulfs inept punter
- Nine preset switches? That’s far from straightforward
- New pine trees around London lake
- Mineral water for Londoners
Buddy explains!
The straight part
We know that "Mineral" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case mineral = serpentine.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 SERPENTINE mean?
SERPENTINE noun- Any of several plants believed to cure snakebites.
- An early form of cannon, used in the 16th century.
- A kind of firework.
- A coiled distillation tube.
- Any of several related cubic curves; anguinea
- To serpentize; to turn or bend; to meander.
- Of, pertaining to, or characteristic of snakes.
- Of, or having attributes associated with, the serpent referred to in the book of Genesis in the Bible, such as craftiness or deceitfulness.
- Having the form or shape of a snake.
- Curving in alternate directions; sinuous.
- Any of several green/brown minerals consisting of a magnesium and iron silicates that have similar layered crystal structure.
- An outcrop or region with soil and rock dominated by these minerals.