Half a bone is replaced in hip (11)
I believe the answer is:
fashionable
'hip' is the definition.
(thesaurus)
'half a bone is replaced' is the wordplay.
'replaced' is an anagram indicator.
'half'+'a'+'bone'+'is'='halfaboneis'
'halfaboneis' with letters rearranged gives 'FASHIONABLE'.
'in' acts as a link.
(Other definitions for fashionable that I've seen before include "What's in" , "Trendy" , "Modish" , "A la mode" .)