Determined to attack (3,2)
I believe the answer is:
set on
This clue is a double definition.
'determined' is the first definition.
(I've seen this before)
'attack' is the second definition.
(I know that attack can be written as set on)
'to' acts as a link.
(Other definitions for set on that I've seen before include "Determined" , "Go" , "Attack" .)