Slice it off clean and use three monocote hinges to repair. Make the monocote hinges from a 1 inch wide strip of covering with another 1 inch piece attached to it sticky side to sticky side. Overlap the two strips the width of the trailing edge of wing where the aileron attachs. Apply with the monocote hinges alternating top and bottom, so that the pulling forces of the hinges offset each other.

Easy to do, hard to explain.