Diane, sort to provide amusement (9)
I believe the answer is:
diversion
'amusement' is the definition.
(I've seen this before)
'diane sort' is the wordplay.
'diane' becomes 'di' (short for Diane).
'sort' becomes 'version' (version is a kind of sort).
'di'+'version'='DIVERSION'
'to provide' is the link.
(Other definitions for diversion that I've seen before include "entertainment" , "Alternative route" , "Amusement -- temporary redirection" , "Detour" .)