The most common and most likely answer to this crossword clue is the 4 letter word LOGO
I've seen this crossword clue in Independent
L
O
G
O
More clues leading to the result LOGO
- See and repair device
- Symbol of goddess of love initially erected
- Symbol for ‘Gentlemen’ primarily seen outside toilet? Just the opposite
- Briefly enter name and means of identification
- Look fit for image
- A sign ladies have drunk gallons
- Losing half its red and blue bits, new Google design?
- Trademark: duck behind chunk of wood
- Can clothing lead to great company image?
- Nothing on trunk to give firm identification?
Buddy explains!

The straight part
We know that "means of identification" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case means of identification = logo.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 LOGO mean?
LOGO noun- A visual symbol or emblem that acts as a trademark or a means of identification of a company or organization.
- (by extension) An audio recording for the same purpose; a jingle.
- A single graphic which contains one or more separate elements.
- An ensign, a badge of office, rank, or power.