Misalignments in the CLIC main linac cause the electron and positron beams to be steered off-center and to produce wakefields whose effects would dramatically limit the CLIC performances. To align the linac and therefore mitigate these effects, beam-based alignment methods, such as Dispersion Free Steering, must be used. Dispersion Free Steering, which already proved to be effective in similar cases, exploits a combination of a nominal beam and one or more off-energy beams to correct the alignment of the machine. Although DFS is already well known, how to produce these off-energy beams in CLIC is still argument of discussion. In this talk we present the idea of exploiting the CLIC Bunch Compressor Stage 2 in order to do that. 
The case of a laser-straight main linac is examined in some details, whereas the case of a linac which follows the Earth's curvature is mentioned and briefly commented. Moreover, the experience gained from similar studies carried out for the ILC main linac is also summarized and some parallels between the two cases are drawn.