The most common and most likely answer to this crossword clue is the 4 letter word AUTO
I've seen this crossword clue in The Times
A
U
T
O
More clues leading to the result AUTO
- US car valuation oddly abandoned
- Fall for American, not half: love his car!
- Nothing following gold tesla car
- Car valuation regularly disregarded
- Thought process provoked by a car salesman?
- Uninitiated quota for developing US estate, maybe
- Car valuation oddly ignored
- Report German car
- Internal mechanism that should feature on Top Gear?
- Burning car in collision with truck west of Evesham
Buddy explains!

The straight part
We know that "his car" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case his car = auto.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 AUTO mean?
AUTO noun- An automobile.
- A setting for automatic operation.
- An automatic gearbox / transmission.
- A car with an automatic gearbox / transmission.
- To travel by automobile.
- Capable of operating without external control or intervention.
- Done out of habit or without conscious thought.
- Necessary, inevitable, prescribed by logic, law, etc.
- (of a firearm such as a machine gun) Firing continuously as long as the trigger is pressed until ammunition is exhausted.
- (of a handgun) An autoloader; a semi-automatic or self-loading pistol, as opposed to a revolver or other manually actuated handgun, which fires one shot per pull of the trigger; distinct from machine guns.
- (of a local variable) Automatically added to and removed from the stack during the course of function calls.
- (of a group) Having one or more finite-state automata
- An autorickshaw.