It has been a source of frustration among some Rangers supporters. The temptation, when signing a new player, is to throw him straight in at the deep end and expect an immediate impact. Manager Philippe Clement, however, is taking the ‘patience is a virtue’ approach, all the while ignoring pleas from sections of the fanbase disappointed about the lack of starts afforded to those summer arrivals. Vaclav Cerny and Robin Propper, former FC Twente team-mates, only made their first appearances in Clement’s XI during Saturday’s 2-1 triumph over Motherwell at Hampden Park. Hamza Igamane and Clinton N…