The most common and most likely answer to this crossword clue is the 5 letter word SACRA
I've seen this crossword clue in The Times
S
A
C
R
A
More clues leading to the result SACRA
- Bones in bag next to top drawer?
- Bones in line, like back
- Bones bend when put back
- Bones Charlie removed from southern African capital
- Bones used in holy rituals, mostly
- Two-thirds chopped off radius behind bag for bones
- Bones buried in Pisa, cracked
- Has a crash crushed bones?
- Bones found in jar, casually tipped over
Buddy explains!

The straight part
We know that "Bones" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case bones = sacra.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 SACRA mean?
SACRA noun- Sacral artery
- A large triangular bone at the base of the spine, located between the two ilia (wings of the pelvis) and formed from vertebrae that fuse in adulthood.