The most common and most likely answer to this crossword clue is the 8 letter word THORACIC
I've seen this crossword clue in Financial Times
T
H
O
R
A
C
I
C
Buddy explains!
The straight part
We know that "referring to a body part" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case referring to a body part = thoracic.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 THORACIC mean?
THORACIC noun- One of a group of fishes having the ventral fins placed beneath the thorax or beneath the pectoral fins.
- Of the thorax.