The most common and most likely answer to this crossword clue is the 6 letter word THORAX
I've seen this crossword clue in Independent
T
H
O
R
A
X
More clues leading to the result THORAX
- Girl brought to mark that locates treasure chest
- Strain loading contents of short chest
- Chest: try stuffing instrument briefly inside
- Place kiss on Ms Hird’s chest
- Trunk call reservation initially covered by levy
- Some soldier perhaps finding God, peace non-starter
- God needs a mark to locate treasure chest
- Divine being with weapon cut down chest
- God having a cross on chest
- Part of body with duty to store hard gold
Buddy explains!

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 THORAX mean?
THORAX noun- The region of the mammalian body between the neck and abdomen as well as the cavity containing the heart and lungs.
- The middle of three distinct divisions in an insect, crustacean or arachnid body to which the legs are attached.