The most common and most likely answer to this crossword clue is the 7 letter word NAMETAG
I've seen this crossword clue in The Guardian
N
A
M
E
T
A
G
More clues leading to the result NAMETAG
Buddy explains!
The straight part
We know that "ID" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case id = nametag.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 NAMETAG mean?
NAMETAG noun- A tag with one's name inscribed on it.