The most common and most likely answer to this crossword clue is the 4 letter word CABS
I've seen this crossword clue in The Guardian
C
A
B
S
More clues leading to the result CABS
Buddy explains!

The straight part
We know that "10s" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case 10s = cabs.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 CABS mean?
CABS noun- Initialism of chest compressions, airway and breathing.
- Initialism of caffeinated alcoholic beverage.
- A taxi; a taxicab.
- Compartment at the front of a truck or train for the driver
- Shelter at the top of an air traffic control tower or fire lookout tower
- Any of several four-wheeled carriages; a cabriolet
- To travel by taxicab.
- A former Hebrew unit of volume, about equal to 1.3 L as a dry measure or 1.25 L as a liquid measure.
- An arcade cabinet, the unit in which a video game is housed in a gaming arcade.