Make a knight (3)
I believe the answer is:
dub
'make a knight' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for dub that I've seen before include "Give nickname, knighthood, to" , "Add soundtrack to film in another language" , "Add a soundtrack in a different language" , "Copy to tape or disc" , "type of music" .)