Welcome to the forums, newcomer!
You might want to also narrow down the source of the noise by taking a sheet of A4 paper, roll it up into a cylinder, holding one end up to your ear. Use the other end to probe for the source the noise.
IMHO, it doesn't sound like clicking. Sounds like a fan blade trying to make a rotation and one of said blades in the fan has broken off. You might want to disconnect the system from the wall and display, then remove the PSU to inspect the PSU without taking it apart.
I can see a Be Quiet! on the rear of the PSU but we'll need a little more info, please list the specs to your build like so:
CPU:
CPU cooler:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Monitor:
include the age of the PSU apart from it's make and model. BIOS version for your motherboard at this moment of time.
Moved thread from Components section to Systems section.