Since no more information is provided, we will suppose that the combinations consist of one accessory and one article of clothing. There are 3 accessories and 6 articles of clothing; therefore, the number of possible combinations is
If only 6 articles of clothing are available, together with 3 different accessories, the number of combinations is 18.
On the other hand, if the problem refers to the different ways the fashion designer can choose 6 articles of clothing from the 7 available, the answer is 7 different combinations.