Censor one line in controversial scene (7)
I believe the answer is:
silence
'censor' is the definition.
(thesaurus)
'one line in controversial scene' is the wordplay.
'one' becomes 'i' (Roman numeral).
'line' becomes 'l'.
'in' indicates putting letters inside.
'controversial' indicates anagramming the letters.
'i'+'l'='il'
'scene' anagrammed gives 'sence'.
'il' going inside 'sence' is 'SILENCE'.
(Other definitions for silence that I've seen before include "There's nothing heard" , "It is said to be golden" , "It is golden acccording to the 1960s song" , "Hush!" , "Lack of sound" .)