The most common and most likely answer to this crossword clue is the 6 letter word CAMEOS
I've seen this crossword clue in The Daily Telegraph
C
A
M
E
O
S
More clues leading to the result CAMEOS
- Computer’s flipping small parts on screen
- Top directors accepting amateur for small roles
- Small parts arrived with large
- Turned up rings and pieces of jewelry
- Carved pieces of jewellery turned out bone
- Small parts showed up on stage initially
- Big bosses have a thousand small roles to play
- Some stones with designs arrived with rings
- Appeared on very big special appearances
Buddy explains!

The straight part
We know that "Small parts" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case small parts = cameos.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 CAMEOS mean?
CAMEOS noun- A piece of jewelry, etc., carved in relief.
- A single very brief appearance, especially by a prominent celebrity in a movie or song.