Inspected without good reason (5)
I believe the answer is:
cased
'inspected' is the definition.
(casing is a kind of inspecting)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for cased that I've seen before include "Carefully inspected (for crime)" , "put in a box" , "Covered, protected; checked over (by robber)" , "examined with intention to rob" , "Reconnoitred (sl.)" .)