The movie 'Clueless' is a modern take on the classic novel. It updates the story for a contemporary audience. The characters in the movie often reflect the archetypes from the novel but with a 90s spin. For example, Cher, the main character, is like the heroine from the novel but with a more fashion - forward and sassy personality. The movie also simplifies some of the complex themes in the novel to make it more accessible to a wider audience through its light - hearted and comical approach.
The story of 'Clueless' which is based on a novel is centered around a girl living in a rather privileged environment. The novel serves as the inspiration for this story where the main character has to deal with various situations such as her own vanity, her attempts to help others in their romantic pursuits, and also her own growth as a person. It takes the essence of the original novel and transforms it into a modern - day, relatable story for a younger audience. For example, just as in the original work, there are elements of miscommunication and misunderstandings that drive the plot forward in 'Clueless'.
To my knowledge, 'Clueless' doesn't seem to be directly based on a particular classic novel. It might draw inspiration from various sources, but not a single well-known classic one.