The most common and most likely answer to this crossword clue is the 5 letter word FUMED
I've seen this crossword clue in Independent
F
U
M
E
D
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 FUMED mean?
FUMED verb- To expose (something) to fumes; specifically, to expose wood, etc., to ammonia in order to produce dark tints.
- To apply or offer incense to.
- To emit fumes.
- To pass off in fumes or vapours.
- To express or feel great anger.
- To be as in a mist; to be dulled and stupefied.