Is he a bit dangerous? (3)
I believe the answer is:
dan
'is he' is the definition.
'a bit dangerous?' is the wordplay.
I cannot really see how this works, but
'a' could be 'an' and 'an' is found in the answer.
A single letter 'd' remains which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for dan that I've seen before include "Skill level in judo" , "Level of proficiency in Japanese combative sport" , "-- Dare, comic hero" , "Tribe" , "An expert in throws" .)