The most common and most likely answer to this crossword clue is the 5 letter word ULNAE
U
L
N
A
E
More clues leading to the result ULNAE
- Bones served up in mean lunch
- Not taking sides, Enterprise captain’s first name recalled is “Bones”
- Bones heads to Enterprise after nicely leading Uhura back
- “Bones”, the reverse of Captain Picard, say, ignoring boundaries
- Crustacean luckily protecting back bones
- Bones a girl finally broke grabbing end of wall
- Two French articles interwoven in parts of skeleton
- Parts of chicken wings perhaps rejected in epicurean lunch
- Bones in ocean luridly reflected
- Heartily pull and eat leg bones
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 = ulnae.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 ULNAE mean?
ULNAE noun- The bone of the forearm that extends from the elbow to the wrist on the side opposite to the thumb, corresponding to the fibula of the hind limb. Also, the corresponding bone in the forelimb of any vertebrate.