"Dapper" guy (3)
I believe the answer is:
dan
'dapper guy' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for dan that I've seen before include "degree of proficiency in judo, say?" , "Proficient combative sportsman" , "Skill level in judo" , "Expertise level in juso" , "Judo level and Wicklow lake" .)