Though two-faced, was worshipped (5)
I believe the answer is:
janus
If this is the answer, I'm afraid I cannot explain it.
Can you help me to learn more?
(Other definitions for janus that I've seen before include "Two-faced person" , "Two-faced deity" , "Roman god of doors, usually two-faced - a month is named for him" , "Roman deity who faces front and back" , "Roman god of doors and beginnings" .)