The most common and most likely answer to this crossword clue is the 4 letter word BYRE
I've seen this crossword clue in Financial Times
B
Y
R
E
More clues leading to the result BYRE
- Report of one purchasing shelter for cattle
- Barn close to river, middle of field
- Told customer where to find Angus
- Rumour of one willing to purchase shed for stock?
- Farm building next to empty ravine
- Close to having evacuated remote farm building
- Rye you dumped in extra farm building
- Stable future homeowner spoke of?
- Purchaser announced for cowshed
- Black phosphorus leaving burning heap in cowshed
Buddy explains!

The straight part
We know that "Barn" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case barn = byre.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 BYRE mean?
BYRE noun- A barn, especially one used for keeping cattle in.