The most common and most likely answer to this crossword clue is the 6 letter word TASSEL
I've seen this crossword clue in The Guardian
T
A
S
S
E
L
More clues leading to the result TASSEL
- Decoration from Territorial Army without backing
- One held in contempt to stop call for decoration
- This decorative item cheers? Not so much, on reflection
- Bit of a cover-up of boobs by some flipping topless attendant
- Tops of taffeta and backless decoration
- It hangs with not so much at back
- Decorative accessory for cheerless atrium partially backed
- Cheers without rising for decoration
- Ornamental trimming around edging of shirts, a sort of teal
- Decoration not so much taken up by soldiers
Buddy explains!

The straight part
We know that "Decorative accessory" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case decorative accessory = tassel.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 TASSEL mean?
TASSEL noun- A ball-shaped bunch of plaited or otherwise entangled threads from which at one end protrudes a cord on which the ball is hung, and which may have loose, dangling threads at the other end (often used as decoration along the bottom of garments, curtains or other hangings).
- The panicle on a male plant of maize, which consists of loose threads with anthers on them.
- The loose hairs at the end of a braid.
- A narrow silk ribbon, or similar, sewed to a book to be put between the pages.
- A piece of board that is laid upon a wall as a sort of plate, to give a level surface to the ends of floor timbers.
- A kind of bur used in dressing cloth; a teasel.
- A thin plate of gold on the back of a bishop's gloves.
- To adorn with tassels.
- To put forth a tassel or flower.