New Testament king (5)
I believe the answer is:
herod
'new testament king' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for herod that I've seen before include "Royal baby-killer" , "Biblical king of Judea" , "child murderer" , "Ruler of Palestine when Jesus was born" , "King of Judea in the time of Jesus" .)