The most common and most likely answer to this crossword clue is the 5 letter word METAL
I've seen this crossword clue in Independent
M
E
T
A
L
More clues leading to the result METAL
- Eg Iron Maiden recently sent up
- Perhaps Iron Maiden and others
- Some extreme talent needed in heavy music
- Element found in motorway and elsewhere
- E.g. copper joined with aluminium
- Bone found in food is mostly hard
- Lead is one for master and others to follow
- Time to tuck into food giving lead, perhaps …
- Lead, perhaps, from last 14 letters?
- Lead possibly given by beginner after team change
Buddy explains!

The straight part
We know that "E.g. copper" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case e.g. copper = metal.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 METAL mean?
METAL noun- (heading) Chemical elements or alloys, and the mines where their ores come from.
- A light tincture used in a coat of arms, specifically argent and or.
- Molten glass that is to be blown or moulded to form objects.
- A category of rock music encompassing a number of genres (including thrash metal, death metal, heavy metal, etc.) characterized by strong drum-beats and distorted guitars.
- The substance that constitutes something or someone; matter; hence, character or temper; mettle.
- The effective power or calibre of guns carried by a vessel of war.
- (in the plural) The rails of a railway.
- (travel) The actual airline operating a flight, rather than any of the codeshare operators.
- To make a road using crushed rock, stones etc.
- Characterized by strong drum-beats and distorted guitars.
- Having the emotional or social characteristics associated with metal music; brash, bold, frank, unyielding, etc.