The most common and most likely answer to this crossword clue is the 11 letter word ACCESSORIES
I've seen this crossword clue in The Daily Telegraph
A
C
C
E
S
S
O
R
I
E
S
Buddy explains!
The straight part
We know that "Accomplices" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case accomplices = accessories.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 ACCESSORIES mean?
ACCESSORIES noun- Something that belongs to part of another main thing; something additional and subordinate, an attachment.
- An article that completes one's basic outfit, such as a scarf or gloves.
- A person who is not present at a crime, but contributes to it as an assistant or instigator.
- Something in a work of art without being indispensably necessary, for example solely ornamental parts.