With memories of last week’s Old Firm derby still stinging, Philippe Clement’s old assistant has come out batting for the under-pressure Rangers boss this week. Johan van Rumst, a three-time Belgian league champion alongside his compatriot with Club Brugge and KRC Genk, insists that the ‘football addict’ that is Philippe Clement can get Rangers pushing for honours too if given the time to mould a squad in his image. An extensive and arguably overdue summer overhaul is certainly a start. Rangers signed ten new players while moving on a host of long-serving veterans, including the now-Trabzonspo…