Bone set in hospital usually (5)
I believe the answer is:
talus
'bone' is the definition.
(talus is a kind of bone)
'in hospital usually' is the wordplay.
'in' says the answer is hidden in the clue.
'TALUS' is hidden in the letters of 'hospital usually'.
'set' is the link.
(Other definitions for talus that I've seen before include "Yarns" , "Ankle bone" , "Ankle-bone" , "Foot's part" .)