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 Daily Telegraph
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Buddy explains!

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.