Detailed inspection or study (11)
I believe the answer is:
examination
I believe this is a double definition.
'detailed inspection' is the first definition.
(I've seen this before)
'study' is the second definition.
(I've seen this in another clue)
(Other definitions for examination that I've seen before include "Test of knowledge" , "Formal test" , "Questions" , "Test of proficiency" , "trial" .)