The most common and most likely answer to this crossword clue is the 4 letter word TAXI
T
A
X
I
More clues leading to the result TAXI
- Vehicle returned at eleven
- Under strain, I move slowly on landing
- Vehicle initially transporting a football team, perhaps
- VAT, perhaps, with one hire car
- Overload current vehicle
- Most of tag team seen in old sitcom
- Army team in vehicle
- Make heavy demands on current vehicle
- Hired vehicle: duty to take one
- Army team's hired transport
Buddy explains!

The straight part
We know that "Cab" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case cab = taxi.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 TAXI mean?
TAXI noun- A vehicle that may be hired for single journeys by members of the public, driven by a taxi driver.
- A share taxi.
- To move an aircraft on the ground under its own power.
- To travel by taxicab.