The most common and most likely answer to this crossword clue is the 10 letter word VERTEBRATE
V
E
R
T
E
B
R
A
T
E
Buddy explains!
The straight part
We know that "bony fish, perhaps" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case bony fish, perhaps = vertebrate.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 VERTEBRATE mean?
VERTEBRATE noun- An animal having a backbone.
- Having a backbone.