The most common and most likely answer to this crossword clue is the 12 letter word ACCOUTREMENT
A
C
C
O
U
T
R
E
M
E
N
T
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 ACCOUTREMENT mean?
ACCOUTREMENT noun- The act of accoutering.
- An article of clothing or equipment, in particular when used as an accessory.
- Apparatus needed for a task or journey.
- Equipment other than weapons and uniform.
- Trappings.
- An identifying yet superficial characteristic.