Quote Originally Posted by curious aardvark View Post
sounds like clogged nozzle.
Yes, but no. (EDIT: Ok, finally looking at the pic, probably yes, but I'll leave the rest for future people searching for clicking noise).

When my bed gets way out of whack, sometimes the tip of the head is too close to the bed. The filament can't get out, and the clicking noise occurs.

So fix both, as they are part of routine maintenance anyways. Clean and unclog the nozzle, and level/calibrate your bed.