Man with papers and style (5)
I believe the answer is:
idiom
'style' is the definition.
(I know that idiom is a type of style)
'man with papers' is the wordplay.
'man' becomes 'iom' (abbreviation for Isle of Man).
'with' means one lot of letters go next to another.
'papers' becomes 'ID' (identifying documents are one's 'papers').
'iom' after 'id' is 'IDIOM'.
'and' acts as a link.
(Other definitions for idiom that I've seen before include "Colloquial saying" , "Colloquialism" , "Word usage peculiar to a specific group" , "Eg, over the moon" , "Characteristic style of expression" .)