Religious symbol (5)
'religious symbol' is the definition.
(Christian symbol)
This is the entire clue.
(Other definitions for cross that I've seen before include "See 2" , "anger?" , "Sign - angry" , "Annoyed - traverse" , "Put out" .)
(Other definitions for sacrament that I've seen before include "A mystery of the church" , "Religious ritual" , "Ceremony such as Christian baptism" , "Church ritual imparting divine grace" , "Religious ceremony" .)