How direct fellows talk about marking system? (3-2-3)
I believe the answer is:
man-to-man
'how' is the definition.
Both the answer and definition are adverbs. Perhaps you can see a link between them that I don't see?
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for man-to-man that I've seen before include "With frankness, as father may speak to son" , "Frank and confidential" , "Directly and frankly" , "Between males, with frankness" , "Frankly and confidentially" .)