The most common and most likely answer to this crossword clue is the 10 letter word SANDALWOOD
I've seen this crossword clue in The Times
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Buddy explains!
The straight part
We know that "Treeware material" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case treeware material = sandalwood.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 SANDALWOOD mean?
SANDALWOOD noun- Any of various tropical trees of the genus Santalum, native or long naturalized in India, Australia, Hawaii, and many south Pacific islands.
- The aromatic heartwood of these trees used in ornamental carving, in the construction of insect-repellent boxes and chests, and as a source of certain perfumes.