NEW MAYBELLINE Define-A-Lash Lengthening Zero Clump Mascara. OBat away clumps & bring on long, luscious, beautifully-designed lashes for exactly the look you want. The brush design of NEW MAYBELLINE Define-A-Lash Lengthening Zero Clump Mascara is unlike any other. Carefully placed flexible bristles allow color to coat lashes without causing clumping, smearing, smudging or flaking so that you can wear your mascara regularly