Section of étude Sir Edward wanted (7)
I believe the answer is:
desired
'wanted' is the definition.
('desire' can be a synonym of 'want')
'section of etude sir edward' is the wordplay.
'section of' indicates the answer is hidden within the clue.
'DESIRED' is hidden in the letters of 'etude sir edward'.
(Other definitions for desired that I've seen before include "Wanted strongly" , "requested" , "Craved" , "much wished for" , "Wanted greatly" .)