Left: gamma-ray emissivity profiles for the CR distributions in Fig. 4 and X-ray emissivity profile of the ICM in grey. Emissivities are normalised to the central emissivity of a cluster with γ_tu = ∞. Right: total gamma-ray flux due to hadronic CRp interactions with the ICM nucleons as a function of γ_tu = τ_st/τ_ad and for α = 2.25, 2.5, and 2.75 (solid, dashed, and dashed-dotted lines, respectively). Normalised to L_γ for γ_tu = ∞. (β_cl = 0.8, R_as = 10).