The most common and most likely answer to this crossword clue is the 10 letter word UNDERSLUNG
I've seen this crossword clue in The Times
U
N
D
E
R
S
L
U
N
G
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 UNDERSLUNG mean?
UNDERSLUNG adjective- Supported from above (especially from the underside of a wing etc)
- Having a low center of gravity