Bachelor artist, fashionable — bright guy (5)
I believe the answer is:
brain
'bright guy' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'bachelor artist fashionable' is the wordplay.
'bachelor' becomes 'b' (abbreviation e.g. BA=Bachelor of Arts).
'artist' becomes 'ra' (Royal Academician, member of Royal Academy of Arts).
'fashionable' becomes 'in' (similar in meaning).
'b'+'ra'+'in'='BRAIN'
Can you help me to learn more?
(Other definitions for brain that I've seen before include "Organ of the intellect" , "Whack on the head" , "Hit hard; intellect" , "Intellectual capacity" , "Mind" .)