a touch of uniqueness; a different flavor; oddity
Often used in the phrase 一風変わった to mean 'slightly unusual' or 'offbeat'. As a noun, it refers to a distinctive or peculiar quality.
See also: 一風変わった
His paintings have a unique, offbeat charm.
この店の料理はどこか一風変わっている。
The food at this restaurant has a somewhat unusual twist.