Devilish way of working in study (5)
I believe the answer is:
demon
'working in study' is the definition.
The answer and definition can be both people as well as being singular nouns.
Maybe you can see an association between them that I don't see?
'devilish way' is the wordplay.
'devilish' becomes 'demo' (I am not sure about this - if you are sure you should believe this answer much more).
'way' becomes 'n' (Compass direction - North).
'demo'+'n'='DEMON'
'of' is the link.
Can you help me to learn more?
(Other definitions for demon that I've seen before include "ace" , "Expert" , "Fiend, devil" , "Fallen angel" , "Wizard" .)