Quarterback Marino (3)
I believe the answer is:
dan
'quarterback marino' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for dan that I've seen before include "Level of proficiency in Japanese martial arts" , "Grade of judo black belt" , "Dark and damp." , "An expert in throws" , "The 19's first archer" .)