The most common and most likely answer to this crossword clue is the 8 letter word STANHOPE
I've seen this crossword clue in The Daily Telegraph
S
T
A
N
H
O
P
E
More clues leading to the result STANHOPE
- Laurel, comedian in old-fashioned conveyance
- Phaetons replaced single-seater carriage
- Sort of posh, neat carriage
- Vehicle taking Laurel and Bob maybe
- Sat, agitated, with phone going off in carriage
- Phaetons, unsteady transport
- Small, specially-designed phaeton carriage
- Ollie’s partner, famous comedian, in one- seater carriage
- Horse-drawn carriage revamped phaetons
- Small sort of phaeton?
Buddy explains!

The straight part
We know that "carriage" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case carriage = stanhope.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 STANHOPE mean?
STANHOPE noun- A gig, buggy or light phaeton, typically with a high seat and closed back.