Question: Was Steph, played by Leslie Ash, supposed to be a mod girl or just a girl who hung around with with mods?because her clothes which was mainly dresses and skirts and a leather coat wasn't really mod girl clothes, her hair was long and in no particular style and wore very little eye make up.A classic mod girl would would have worn ski pants, have a short hairstyle like a bob and would wear dark eye make up like other girls in the film.
Answer: Your description of "Mod" is too limited. It included a wider range of fashion styles beyond what you've described and included mini-skirts, geometric-patterned dresses, casual hip-hugger pants, leather coats and jackets, and so on. The same with hairstyles which varied from short, angular bobs, to beehives, and long tresses with feathered bangs. The "natural" look was also in style then, along with the more extreme make-up type. Steph certainly fit into the overall Mod style and culture.
Answer: Yes.