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the meaning of clean and green is the city is clean because their city is not litering and they have lots of plants and trees
It can of course mean it is a clean car meaning it is not dirty. Or it can mean it is a clean machine meaning it is sharp of nice looking. It can also mean it has a clean title, meaning there is no lien on the vehicle.
O.C. stands for obsessive compulsive - an anxiety disorder about perfection, rules, organization, etc.
The antonym or opposite meaning of pollution would be extra clean; too clean.
the house clean
of Clean, The act of making clean., The afterbirth of cows, ewes, etc.
You might mean "clean lines" which means without frills or ornamentation when describing a car or a piece of clothing. Or maybe you mean "cleanliness" which is the state of being clean. Better spelling would result in better understanding.
Maria will clean. Maria goes to clean. Maria is going to clean. The exact meaning depends on context.