Did Elvis nag about the du Maurier controlling character? (8)

I believe the answer is:

svengali

(Other definitions for svengali that I've seen before include "Master manipulator" , "Complete controller" , "Evil hypnotist in the George du Maurier novel, Trilby" , "Control freak" , "Person who controls another's mind - musician and evil genius (created by George du Maurier)" .)

I've seen this clue in The Irish Times.

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