The most common and most likely answer to this crossword clue is the 8 letter word KNEECAPS
I've seen this crossword clue in Independent
K
N
E
E
C
A
P
S
Buddy explains!
The straight part
We know that "Body parts" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case body parts = kneecaps.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 KNEECAPS mean?
KNEECAPS noun- The flat, roundish bone in the knee.
- (roofing) A metal cover trim that fits over a panel rib after it has been cut and bent.
- A cap or strong covering for the knees, used chiefly for horses, to protect their knees in case of a fall.