The most common and most likely answer to this crossword clue is the 8 letter word LANDFILL
I've seen this crossword clue in The Guardian
L
A
N
D
F
I
L
L
Buddy explains!
The straight part
We know that "Refuse to be buried" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case refuse to be buried = landfill.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 LANDFILL mean?
LANDFILL noun- A site at which refuse is buried under layers of earth.
- The material so disposed of.
- To dispose of (garbage) by burying it at a landfill site.