The most common and most likely answer to this crossword clue is the 3 plus 4 letter word COP SHOP
I've seen this crossword clue in The Guardian
C
O
P
S
H
O
P
More clues leading to the result COP SHOP
- Nick is landed with hard work
- Nick takes short trip
- Note work — quiet work, in police station
- Nick sees parrot initially quiet in cage
- Policemen’s ball? You might be arrested there
- Carbon monoxide starts to poison some households by old power station
- Hard work follows arrests in police station
- Nick‘s short match on grass
- Old police sergeant involved in church work — retired from here?
- Prisoner initially quiet in cage in police station
Buddy explains!

The straight part
We know that "Nick" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case nick = cop shop.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.