Wanted something done about Elton's title? (7)
I believe the answer is:
desired
'wanted' is the definition.
(similar in meaning)
'something done about elton's title?' is the wordplay.
'something done' becomes 'deed' (a deed is something done or performed).
'about' is an insertion indicator.
'elton's title?' becomes 'sir' (as in Sir Elton John).
'deed' going around 'sir' is 'DESIRED'.
(Other definitions for desired that I've seen before include "much wished for" , "Sought after" , "Craved" , "Lusted-after" , "Wanted strongly" .)