Maestro returned books with study in India (9)
I believe the answer is:
toscanini
'maestro' is the definition.
(I've seen this before)
'returned books with study in india' is the wordplay.
'returned' says the letters should be written backwards.
'books' becomes 'OT' (Old Testament).
'with' is a charade indicator (letters next to each other).
'study' becomes 'scan' (I've seen this before).
'india' becomes 'i' (phonetic alphabet: alpha, bravo, charlie etc.).
'ot' back-to-front is 'to'.
'to'+'scan'+'in'+'i'='TOSCANINI'
(Other definitions for toscanini that I've seen before include "Maestro" , "Acclaimed Italian conductor" , "Virtuoso conductor" , "He conducted" , "Bare rock formation" .)