Clanging, metallic noise that goes away

First time I heard I was coming to a stop.
Sounded awful, like steel on steel and perhaps steel being dragged along the road or something. Bunch of different sounds all twisted together. Thought it was someone else's car, as it was gone after I kept driving. Couple days later, heard some more awful sounds while backing up. Drove forward and they disappeared. Couple days later, while driving at road speed (seventy km/h or so) heard some more awful steel on steel sounds, though not as bad as first time. They lasted a bit longer this time, maybe a minute of driving before I pulled over. They disappeared again. This is a car I bought used recently. I know the bushings and struts need replacing, but would they be causing this other noise, as opposed to the clunking noise I hear when driving over bumpy roads on a cold day.

Have also taken tires off and looked at all components. Nothing loose and plenty of brake pad. Engine drives fine except for that whine when accelerating which I am told is normal for Honda. Shifts gears fine. Was told clutch was replaced not too long ago. Could transmission be going. Teeth grinding? Why does the sound come and go for no specific reason as yet?