After you clear out some dirty fluid, yes. If you're using a small i.d. hose into a reducer into the plug boot, it won't take much fluid to do the bleed job.

I have a question on you bleeding of a clutch. I just want to make sure I understand you, I need to run the hose all the way back up to the clutch reservoir once I let fluid drain from it first? So I am guessing the hose need to be pretty long to reach that?? I am using a new slave and master cylinder and want to get it right!!

David