Hinged joint (4)
I believe the answer is:
knee
'hinged joint' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for knee that I've seen before include "Hinge joint" , "This is capped by the patella" , "for going on begging" , "Wounded in Indian Wars action" , "middle part of leg" .)