The most common and most likely answer to this crossword clue is the 7 letter word MOUNTIE
I've seen this crossword clue in Independent
M
O
U
N
T
I
E
More clues leading to the result MOUNTIE
- Cop, second one in Paris Match
- Foreign policeman crashing into emu
- Second free member of Canadian police
- Canadian law enforcer free to pursue method of working
- Montana to release cop from over the border
- Way of working with loose policeman on a prairie?
- Second cousin’s mum’s not a cop
- Ma almost gets free copper from Canada
- Officer in the saddle, flash and loose
- Sum that’s missing a policeman found
Buddy explains!

The straight part
We know that "copper from Canada" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case copper from canada = mountie.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 MOUNTIE mean?
MOUNTIE noun- A member of the Royal Canadian Mounted Police.
- A law officer, particularly one patrolling rural highways.