The term fashion is often used to describe any shoot where the model is clothed, but this category is really for use when modelling a designers clothes for a special market. Models need to be tall (over 5' 8" and reasonably thin).
Top end of the modelling tree, fashion is an area so many models aspire to doing and is very hard to get into as apart from having the right look and height getting in with a fashion photographer or retailer is very competitive, models need to have been modelling for some time (two years typically) and be experienced enough to be able to pose and act as the client requires. This often entails the right expression too for the clothes worn and the location.
Pay can be lucrative and can often result in editorial content for the model