The most common and most likely answer to this crossword clue is the 10 letter word INIMITABLE
I've seen this crossword clue in The Sunday Telegraph
I
N
I
M
I
T
A
B
L
E
More clues leading to the result INIMITABLE
- Small back on essentially big piece of furniture is unique
- One small car overturned on plateau. Remarkable!
- Retro model bat I’m initialling to keep unique
- Unique car put up on one stand
- I, with car, returned piece of furniture not matched by others
- Sublime one with short skirt raised on counter
- Distinctive little car reversed, then one put forward
- One-off dress should be raised with one on board
Buddy explains!

The straight part
We know that "not matched by others" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case not matched by others = inimitable.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 INIMITABLE mean?
INIMITABLE adjective- Beyond imitation, surpassing all others, matchless.