Had the clutch go out on my 250R dirt bike. If it is going out, there will be no question. It will just start slipping and you will be happy just to make it home.
To see how weak/strong it is, put the tranny in 3rd or 4th, rev the motor up some, & see how easy it is to kill the motor by letting the clutch out. I don't mean to peg the throttle & dump the clutch, just get a 'feel' for how much effort it takes on the lever to keep it slipping. Don't slip it for more than a second or two at a time to prevent overheating something. If it requires noticeable pressure on the lever to keep the engine from dying, the clutch facings will go a while yet. As for the clicking...that could be one of several things. What conditions cause it to make this noise?