Church worker to attack, carrying cross (6)
I believe the answer is:
sexton
'church worker' is the definition.
(I've seen this before)
'attack carrying cross' is the wordplay.
'attack' becomes 'seton' ('set on' can be a synonym of 'attack'**).
'carrying' indicates putting letters inside.
'cross' becomes 'x'.
'seton' placed around 'x' is 'SEXTON'.
'to' is the link.
(Other definitions for sexton that I've seen before include "Church bell-ringer or grave-digger" , "Person who looks after church and churchyard" , "Officer of the church on the Irish rugby team?" , "One might dig" , "Church employee" .)