I agree with whynotthinkwhynot. If you did not have the problem before the clutch replacement then it more than likely is an issue with the clutch not fully disengageing. Try the suggested rebleed first. Also, with a new clutch you obviously have brand new clutch friction material which is also at it's thickest, and it will also have some surface variation which will "true up" after a few "takeoffs" and use of the clutch, which may help.