Actor Kristofferson (4)
I believe the answer is:
kris
'actor kristofferson' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for kris that I've seen before include "Malay dagger, wavy blade" , "-- Kringle, Santa Claus" , "Malayan dagger" , "Malaysian knife with a scalloped edge" , "Indonesian dagger; sounds like fold" .)