Penny put on jeans, moving large hips, etc (6)
I believe the answer is:
pelvis
'hips etc' is the definition.
(hips are part of the pelvis)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for pelvis that I've seen before include "Hip-bone/sacrum area" , "Bony structure at the base of the spine" , "Part of body" , "Basin-shaped bone structure at lower end of body" , "It supports the lower limbs" .)