Learner's definition of CLOTHING
the things that people wear to cover their bodies
an expensive article/item/piece of clothing
women's/men's/children's clothing [=clothes]
We're collecting food and clothing for the poor.
Only people wearing protective clothing may enter the room.
— often used before another noun
see pictures of clothing starting on this page
a wolf in sheep's clothing
clothing and clothes
Clothing is somewhat more formal than clothes and is not used in speech as often as clothes. There is no singular form of clothes, but you can talk about an article/piece/item of clothing if you want to refer to one thing that you wear.
a shop that sells vintage clothing
Food, clothing, and shelter are things that every person needs.
I need to put on some clean clothes.
He's wearing fancy clothes today.