The most common and most likely answer to this crossword clue is the 5 letter word GARTH
G
A
R
T
H
Buddy explains!

The straight part
We know that "Yard" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case yard = garth.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 GARTH mean?
GARTH noun- A grassy quadrangle surrounded by cloisters
- A close; a yard; a croft; a garden.
- A clearing in the woods; as such, part of many placenames in northern England
- A group or a household dedicated to the pagan faith Heathenry.
- A location or sacred space, in ritual and poetry in modern Heathenry.
- A dam or weir for catching fish.