The Dark Energy Survey has just started the task of mapping 5000 square degrees of the southern sky using DECam, a 570 mega-pixel camera set at the 4-meter Blanco telescope in CTIO, Chile. This will provide the collaboration with photometric information of almost 300 milion galaxies, to study dark energy using several probes. A “Science Verification” (SV) period of observations provided science-quality images for about 150 square degrees at the nominal depth of the survey. In this study we use N-body simulations (DES-MICE) of DES-SV size to combine weak gravitational lensing with galaxy clustering and extract the galaxy bias together with the cross-correlation coefficient. In particular, we use galaxy clustering to measure the bias as a function of scale and, with this in hand, make usage of galaxy-galaxy lensing to extract the cross-correlation coefficient. Additionally, we employ cosmic shear to determine the amplitude of matter fluctuations, σ₈. We achieve precisions of order 5–7% in all three parameters: σ₈, b and r, assuming them to be independent of scale. We conclude that the measurement is competitive, and therefore will be applied to DES-SV data as soon as the final data processing becomes available.