Preparing to rob of cover? (6)
I believe the answer is:
casing
'cover?' is the definition.
(I've seen this in another clue)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for casing that I've seen before include "Recceing" , "This gives protection" , "Outer protective covering" , "Outer covering of something" , "Protective shell" .)