The upper for an article of footwear illustrated in the drawings is a first embodiment showing a right-footed form of the upper for an article of footwear. A second embodiment is for the left-footed form of the upper for an article of footwear, which is a mirror image of the right-footed form, is not illustrated. The broken line illustration in the drawings forms no part of the claimed design. The dot dash line illustration in the drawings defines a boundary around the claimed design and also forms no part of the claimed design.