I get a clicking sensation in my right elbow when I perform diamond pushups. Is this something I should be worried about?
No. I have it. A lot of people I know have it. It’s probably just tendon/ligament popping. Don’t worry. But do try to avoid it happening by experimenting with different hand placements, elbow positions etc.
As long as there’s not actual pain, it’s probably nothing, a little minor ‘crepitation’. Let me just write you a quick prescription for a pair of testicles and you can go right back to training 
Stu