The most common and most likely answer to this crossword clue is the 8 letter word METALLIC
I've seen this crossword clue in Financial Times
M
E
T
A
L
L
I
C
More clues leading to the result METALLIC
- Convened everyone in charge of copper, perhaps
- Quivering with ‘it’ – call me ‘brassy’ perhaps
- Irony of lake’s contribution to climate change?
- Iron-like Margaret’s opener: “Tell CIA to get lost”
- Markon shortened beat of copper?
- Encountered everyone in charge of minerals
- London police in charge, kettling everybody — that’s harsh
- Setter receiving great kick in the guts — from copper?
- Some elements on the Left added to contentious climate
- Lustrous academic ill at embassy, insiders recalled
Buddy explains!

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 METALLIC mean?
METALLIC noun- A metallic color.
- Of, relating to or characteristic of metal.
- Made of or containing metal.
- (of a sound) Harsh, as if coming from two metals striking one another.
- (of a color) Having the appearance of being of polished metal.