Adjustable part of a car seat Crossword Clue

 The adjustable part of a car seat that is the answer to the crossword clue is HEADREST. It has 8 letters.

The headrest is the cushioned part of the car seat that supports the head of the occupant. It is adjustable so that it can be positioned to provide the best support for the occupant's head and neck. The headrest can be adjusted up and down, and it can also be tilted forward or backward.

The headrest is an important safety feature of the car seat. It helps to protect the occupant's head and neck in the event of a collision. The headrest should be adjusted so that it is at least 2 inches above the occupant's ears.