Hi,
As long as the replacement part is correct type, you should be able to do under 60min ( if your novice). Just make sure it is routed the same way the old one. Make record of the gearbox cable end locking nut positions but for reference only as final adjustment will have to be made anyway. The old one was probably stretched a bit. Inspect the metal wedge/ cable saddle art the clutch lever, clean it and give some lube. Do you know where the cable snapped? as passing through bulkhead or at the g/box end?