#1
My amp makes a buzzing sound when it is supposed to be set too clean. Could I need to replace something in the amp? It is a little crate amp if that helps any
#2
Is this when you turn the clean volume all the way up? That's most likely the cabinet vibrating, and that's something pretty much inherent in all cheap solid-state amps.

However, if you're talking about a buzz coming through the speaker, that's your hum which is inherent with playing electric guitar. What guitar do you use to play through? Chances are if it's a cheaper guitar with single coils, there will be a fair bit of hum, even on clean.
#6
It is a crate amp, it is a buzzing coming from the speakers. I don't even have to play to get it.