Location of hip joint featuring rock star on piano (6)
I believe the answer is:
pelvis
'location of hip' is the definition.
'pelvis' can be an answer for 'hip' ('pelvis' can be a synonym of 'hip'). I am not certain of the 'location of' bit.
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 "Large bone" , "Large part of skeleton" , "It supports the lower limbs" , "Hip structure" , ".Basin-shaped bone framework in lower body" .)