Kapoor of "Slumdog Millionaire" (4)
I believe the answer is:
anil
'kapoor of slumdog millionaire' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for anil that I've seen before include "Colouring" , "Indigo (plant or dye)" , "West Indian shrub, source of indigo" , "It produces dye" , "Species of blue" .)