The most common and most likely answer to this crossword clue is the 4 letter word OSSA
O
S
S
A
More clues leading to the result OSSA
- Greek mountain’s huge appeal
- Old turkey going about this mountain
- Pop star regularly eats starter of spare ribs, say
- Bones revealed by map-makers when travelling west
- Spies in Jerusalem uncovered bones
- When extremely upset, some toss away the bones
- As usual, regularly picked on duck bones
- Bones in duck and turkey withdrawn
- Bones discovered after force leaves pit
- Some colossal 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 = ossa.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 OSSA mean?
OSSA noun- Bone.