Hip dislocated recently due to stamp collecting (9)
I believe the answer is:
philately
'stamp collecting' is the definition.
(I know this)
'hip dislocated recently' is the wordplay.
'dislocated' is an anagram indicator.
'recently' becomes 'lately' (synonyms).
'hip' with letters rearranged gives 'phi'.
'phi'+'lately'='PHILATELY'
'due to' is the link.
(Other definitions for philately that I've seen before include "stamps territory?" , "collecting small items that may grow in value" , "Study of postage stamps" , "pursuit" , "interest in stamps" .)