The most common and most likely answer to this crossword clue is the 7 letter word MUGSHOT
I've seen this crossword clue in The Guardian
M
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More clues leading to the result MUGSHOT
- Maybe barista’s warning, still, of criminal?
- Fool’s stolen a photo
- Barista’s warning police still?
- Assaults exciting — still on police record?
- Picture on police records a warning to coffee drinker?
- Print Starbucks’ warning?
- Dupes have stolen criminal’s photo
- Fool’s stolen criminal record
- Still warning to handle drink with care?
- Stolen cups lead to suspect’s capture
Buddy explains!

The straight part
We know that "police /still" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case police /still = mugshot.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 MUGSHOT mean?
MUGSHOT noun- A photograph taken of the head and shoulders, often from the front and in profile, usually taken in conjunction with somebody's arrest.
- An unflattering photograph of a person's face.