Maybe Murdoch's revolutionary virtual assistant (4)
I believe the answer is:
iris
'maybe murdoch's' is the definition.
(author Iris Murdoch)
'revolutionary virtual assistant' is the wordplay.
'revolutionary' says the letters should be written in reverse (letters revolve around).
'virtual assistant' becomes 'siri' (I've seen this in another clue).
'siri' backwards is 'IRIS'.
(Other definitions for iris that I've seen before include "Plant with sword-shaped leaves" , "plant with showy flowers" , "Woman" , "may open up in camera" , "Coloured eye part" .)