The most common and most likely answer to this crossword clue is the 3 plus 4 letter word OLD BILL
I've seen this crossword clue in Financial Times
O
L
D
B
I
L
L
More clues leading to the result OLD BILL
- Ancient advertisement for the police
- What should already have been paid in coppers
- Out-of-date announcement for the police?
- Vintage poster depicting Boys in Blue
- Historic legislation for the police
- It should have been settled … with force
- Police using out of date legislation?
- Coppers or pound note?
- Liberal Democrat in centre of Alloa upset the police
- Elderly beak summoning the police
Buddy explains!

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.