Azimuthal correlation distributions in the 30--50\% centrality class of \PbPb collisions at \snnfive and for the interval $0.20\zt0.30$, for isolated-narrow clusters triggered in the range $20 \ptT~25$~\GeVc, with charged-particle tracks in the same collision (``Same event'', black-open circles) or in a different collision (``Mixed event'', red without marker). The result of subtracting the mixed-event distribution is shown in blue-full circles. The vertical bars indicate the statistical uncertainties.