The ornamental design for a towelclip with brush, as shown and described.
FIG. 1 is a front perspective view of a towel clip with brush according to the present design;
FIG. 2 is a front view of a towel clip with brush according to the present design;
FIG. 3 is a rear view of a towel clip with brush according to the present design;
FIG. 4 is a right side view of a towel clip with brush according to the present design;
FIG. 5 is a left side view of a towel clip with brush according to the present design;
FIG. 6 is a top view of a towel clip with brush according to the present design;
FIG. 7 is a bottom view of a towel clip with brush according to the present design; and,
FIG. 8 is a front perspective view of a towel clip with brush in use.
The broken lines in FIG. 8 depict environment and forms no part of the claimed design. All other broken lines depict portion of the towel clip with brush that form no part of the claimed design.