Here are a few modifications that I have used on myself as well as my clients when the hips pop, for example when doing single leg circles in Pilates.
Important point, if your hip hurts then before doing any modifications see your doctor before hand , these modifications are only if the hips are pain free.
- Definitely make your circles smaller.
- Sometimes changing the position of your pelvis will eliminate the popping the sound.
- Adjust or change your leg alignment.
Hope this helps.