The most common and most likely answer to this crossword clue is the 7 letter word ALBERTA
I've seen this crossword clue in Financial Times
A
L
B
E
R
T
A
More clues leading to the result ALBERTA
- Warning about British approaching a region of Canada
- Lab rat harassed around English province
- Late bar vibrant in province
- prairie province
- Here in Canada it’s a pound over the fixed rate
- Vigilant around leader of battalion, a Canadian province
- Warning about British area, region of North America
- Warn area about British in part of Canada
- Banff setting theatre blatantly uses in review
- Warning about book provided by a province
Buddy explains!

The straight part
We know that "province" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case province = alberta.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.