The most common and most likely answer to this crossword clue is the 8 letter word TUNGSTEN
I've seen this crossword clue in The Sunday Telegraph
T
U
N
G
S
T
E
N
More clues leading to the result TUNGSTEN
- Metal end of dart catches wildebeest from underneath
- Element in languages voiced by cardinal
- Metal cask to hold gent’s rum
- Metal cask German sent abroad
- Element in languages discerned by cardinal
- Cask gets rebuilt with new metal
- Element in cask gets mixed with nitrogen
- Metal barrel by gents removed
- Element speaking languages before 10
- Element of spoken languages, a number
Buddy explains!

The straight part
We know that "Element" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case element = tungsten.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 TUNGSTEN mean?
TUNGSTEN noun- A rare metallic chemical element (symbol W, from Latin wolframium) with an atomic number of 74.
- A light bulb containing tungsten.
- Scheelite, calcium tungstate