The ornamental design for a clothesrack, as shown and described.
1. Clothes rack
1.1 : Perspective
1.2 : Front
1.3 : Back
1.4 : Top
1.5 : Bottom
1.6 : Right
1.7 : Left
No protection is sought for the features shown in broken lines. The clothes rack is shown with a symbolic break in its length. The appearance of any portion of the article between the break lines forms no part of the claimed design.