Quick test noted for giving maximum return? (4)
I believe the answer is:
exam
'quick test' is the definition.
'exam' can be an answer for 'test' (I've seen this in another clue). I am not sure about the 'quick' bit.
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for exam that I've seen before include "Written test" , "Test (abbr)" , "In brief, a test as in school" , "Formal knowledge test" , "End-of-course assessment" .)