The answer is:
Either Wash or white
white clothing
WashclothWashcloth
The large white pig
Pig wash OP: I was actually thinking of "Hogwash"
White skin
Body wash OP: I was actually thinking of "Backwash" but yours works
white matter in brain
Brain wash
White LED headlights
Car wash
Board --> Whiteboard
washboard
Big white laugh or white teeth
mouthwash
White Rabbit
A watch ---> Wash OP: I was actually thinking of "Whitewash"
Here's a clean and easy visual riddle:
White is the colour of cleanness and you get clean by washing your body
