The most common and most likely answer to this crossword clue is the 7 letter word STORAGE
I've seen this crossword clue in The Guardian
S
T
O
R
A
G
E
More clues leading to the result STORAGE
- Sort of heater that is so great when repaired
- Herb orbiting rock in space
- Set out to pinch gold and silver for stash
- Keeping of electronic data keeps soldiers in step
- Soldiers in division given somewhere to put stuff
- Gold blocks present in repository
- Space for keeping silver in shop
- Repository used by shop endlessly over the years
- Way to love fashion in warehouse
- Coach carrying gold making room for carriage?
Buddy explains!

The straight part
We know that "room for carriage" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case room for carriage = storage.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 STORAGE mean?
STORAGE noun- The act of storing goods; the state of being stored.
- (usually countable) An object or place in which something is stored.
- (usually uncountable) Any computer device, including such as a disk, on which data is stored for a longer term than memory.
- The price charged for storing goods.
- To put into storage; to store.