Get ready to shoot (4,3)
I believe the answer is:
take aim
'get ready to shoot' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for take aim that I've seen before include "Sight a target" , "train" , "Point a weapon at the target" , "Point gun at one's target" , "Fire's said to follow this" .)