Take up clunk

dodgy slave cyliner maybe, assuming your clutch is hydraulic. depending what year your mondy is. i have just forked out a fortune cos my slave failed altogether. new clutch and slave cylinder.

Check your gearbox mounts (roll restrictors) aren't knackered, the rear one is obvious and the front is a bit more concealed near the radiator undertray. They are notorious for going, an easy cheap fix is to fill them with polyurethane.

Thanks for replies. I know clutch needs doing soon which will include slave cylinder so may be the cure. Will be checking out those mounts in the mean time.