noun, na-adjective, noun which may take the genitive case particle 'no'
love of cleanliness; neatness; tidiness
Describes a person who likes things clean and tidy; often used as a personality trait.
彼女はきれい好きで、いつも部屋を片付けている。
She loves cleanliness and is always tidying up her room.
きれい好きな人は、整理整頓が得意だ。
People who are neat are good at organizing.
Compound of きれい (clean, pretty) and 好き (liking). The exact historical derivation is straightforward; the word has been in common use for describing a tidy personality.